Air Stones

bikie8 · 06-09-2010, 10:17 PM

Hi
I have a 10g freshwater tank with fish and plants, I have seen air stones and the like. What do these do? What are the benefits?
Thanks

NursePlaty · 06-10-2010, 06:28 AM

I believe some people use them for "show" because it looks nice. Another reason is to induce oxygen into the tank. There are some people that inject CO2 into the tank to promote plant growth. At night, plants stop taking in CO2 and take in O2 instead. With the CO2 running and nothing to take it in, the fish will gasp and die. The air stone adds O2 during the night. I personally just turn off my CO2.

James0816 · 06-10-2010, 07:34 AM

^ x2

Mainly asthetics. They are also used to create surface movement will prevent the biofilm from forming on top of the water.

Shotgun · 06-12-2010, 09:42 PM

for one, some people find that they look good. gives more movement in the tank. it also keeps the water circulated and promotes more oxygenation in the water (although some people say that it doesn't promote any oxygenation in the water)

but mainly, people use them for asthetic purposes...

Brittrugger · 06-13-2010, 05:18 AM

Yup what they said. However the oxygenation is definitely real based on physics.

ChristineS · 06-13-2010, 06:27 AM

They definitely do something good, I use them with all my vernal pool critters and the survival rate of larvae (which need about five times more oxygen than than adults) has tripled.

NativeKeeper · 06-13-2010, 11:25 AM

Oxygen consumption, or addition , in your home aquarium is a constant topic of discussion among us fish keepers, but do we really understand what is going on inside of our tanks ?

If you are a little in doubt on this issue, you are like most home aquarium keepers. It can be very hard to imagine something that you can't see, especially when the ammounts are so small. Can you really imagine just how small 7 parts per million is?

Maybe the examples below, would be useful.

Say for example, you have a 135 gallon tank that you've stocked with 5 lbs. of various fish. The water in that tank is 79 degrees, with a pH of

7.0 , as per usual, you tend to feed a bit heavy (We love to see our fishies eat RIGHT !!) . Your fish are fed 1% of their body weight per day . Using well calculated formulas from the aquaculture society, this is how the math works out: Your 5 lbs. of fish will require .9 grams of oxygen per hour. That is equal to 21.6 grams of oxygen per day.These fish will produce .8 grams of NH3-N per day.
The amount of oxygen needed by the bio-filter to convert this ammount of Ammonia to Nitrate and make of the bacteria happy, is 5.4 grams of oxygen per day.

This makes the total biological oxygen demand for your tank 27 grams of oxygen per day.

Now, what is a simple source for this oxygen.
Air stones are by far the least expensive, and the most efficient way to aerate and add oxygen to the aquarium. Aeration can take place in the tank, filter, sump, or protein skimmer if youre a saltwater tank keeper. It makes no difference where the oxygen is added into the system, as long as it is present in adequate ammounts.

A pretty small, high quality air stone, will add a little less than .10 cubic feet of air per minute. Three of these stones will add 1.8 grams of oxygen to the water per hour, 43.2 grams of oxygen per day.

Oxygen saturation happens somewhere between 6 and 8 parts per million , this number depends on the temperature, salinity and elevation where you live. That means that the water molecules have absorbed as much oxygen as they can hold under those conditions. Any oxygen taken in beyond this point will be released back into the atmosphere with very little disturbance of the water.

75% oxygen saturation is not un-common in a well aerated aquarium, while 95% is almost impossible to achieve.

Since your tank has an oxygen demand of 27 grams, and the air stones are adding an oxygen level of 43.2 grams, there is no danger of a low oxygen stress condition.

Your tank will use and store only a certain amount of the available oxygen. And while its true that you can have a large amount of surface area in your biofilter, it is very unlikely that the bacteria will use all of it.

Remember, that the nitrifying bacteria are present in levels that are in direct proportion to the bioload of the tank. It doesnt matter to the bacteria how big your filter is. If they need and use only 10% of the surface area, that is what they will use. About 80% of the tank’s oxygen demand goes to the fish, with the other 20% going to the bacteria for the nitrification of organic waste.

So, your average fish tank is not using nearly as much oxygen to process the biological waste as you may have thought. While this has been long known by professional aquarists, it has taken a long time for that information to get to the aquarium hobbyist. Both wet/dry and fluidized bed biological filters utilize the same amount of oxygen to process fish waste.
Sooooo...... are air stones useful beyond the pretty bubbles they produce????? I vote Yes

Brittrugger · 06-13-2010, 11:35 AM

Definitely. Well truely it comes down to the O2 demand in your tank and whether or not u need it, but it certainly wont hurt your fish and might save them.

WhiteGloveAquatics · 06-13-2010, 02:52 PM

I keep one running in my co2 injected tanks at all times, they aid the plants and fish at night as well as keep O2 in the water. Yes they do bring in O2 just at the regular rate of 20% which our own air is made up of(all an air pump does is transfer the air in your house to the tank, nothing more nothing less) Co2 is 1% of the air we breathe so in turn it is bringing in O2 and Co2 however its at the 20% and 1% ratios.

Aesthetics are for people who dont know what to spend their money on.

James0816 · 06-14-2010, 06:34 AM

Quote:

Originally Posted by WhiteDevil

Aesthetics are for people who dont know what to spend their money on.

Luv this comment!

bikie8 · 06-14-2010, 08:22 AM

Thank you for all the input. It sounds like it is a good idea to have then. Do any of you have any recommendations on ones which are quiet to run?

Jasone487 · 06-14-2010, 09:19 AM

ive used Aquarium Air Pumps: Whisper Air Pumps a few times, they are super quiet and kinda cheap.

James0816 · 06-14-2010, 09:25 AM

They are all quiet to me. I only run them at night while I'm asleep so can't really hear them. ;o)

WhiteGloveAquatics · 06-14-2010, 10:39 AM

I use livewell air pumps, marine metal products makes them.

I use the A-9000
mmpweb3

scroll down about 2/3rds the way down the page, its a commercial air pump but it runs quieter then my coralife luft pump does. I like it because its variable and I can run plenty of tanks off one pump.

bikie8 · 06-14-2010, 05:28 PM

Thanks for all the advice. I have bought a pump and airstone. It works really well. My hopefully last question is about check valves. I understand you dont need one as long as the pump is higher than the tank? Is this correct?I actually bought one (a top fin one) which is terrible and doesnt allow much air through. So I am wondering if I should just return it or return it and get another type?

Jasone487 · 06-14-2010, 06:30 PM

you are correct. as for the top fin ones im not sure. i use them just incase, never know and they are only like 2 bucks. got mine off drfostersmith also not sure what brand came in a baggie.

Melvis · 07-15-2010, 11:23 AM

I've just installed one in my 70 litre tank to try and improve the circulation of the water and the O2 levels...it's certainly effective, but I don't know whether the flow is a bit intense for my fish and I can't see any way of adjusting it. Do people usually leave them on all day and night?

James0816 · 07-15-2010, 11:27 AM

I only run at night since I run co2

Brittrugger · 07-15-2010, 01:47 PM

They usually come with valves,or if not you can pick them up pretty cheap and use them to adjust the amount of airflow they produce.

TylerT · 07-15-2010, 05:14 PM

in a planted tank the plants taking c02 and still release o2 right? so would you need a o2 pump if you have a tank that has like 5 plants in it?

06-09-2010, 10:17 PM	#1 (permalink)
bikie8 Join Date: Jun 2010 Posts: 33 Feedback: 0 / 0% Said "Welcome to Aquarium Forum" 26 Times Said "Thanks" 0 Times Was Thanked 0 Times in 0 Posts	Air Stones Hi I have a 10g freshwater tank with fish and plants, I have seen air stones and the like. What do these do? What are the benefits? Thanks

06-10-2010, 06:28 AM	#2 (permalink)
NursePlaty Queen Platy NursePlaty's Photo Gallery Join Date: Feb 2010 Posts: 932 Name: Annie Pham Location: Dallas Ft Worth, Texas Feedback: 1 / 100% Said "Welcome to Aquarium Forum" 266 Times Said "Thanks" 41 Times Was Thanked 186 Times in 180 Posts	Re: Air Stones I believe some people use them for "show" because it looks nice. Another reason is to induce oxygen into the tank. There are some people that inject CO2 into the tank to promote plant growth. At night, plants stop taking in CO2 and take in O2 instead. With the CO2 running and nothing to take it in, the fish will gasp and die. The air stone adds O2 during the night. I personally just turn off my CO2. __________________ 55gallon Light - 6500K CFL, 23wattsx5 5hr/day Substrate - Red Mexican Clay, Sphagnum Peat moss, Eco-Complete Misc- Pressurized CO2, EI Dose KNO3, KH2PO4, CSM-B Plants -Limnophila Aromatica, Stargrass, Dwarf Hair Grass, Christmas Moss, Baby Tears (HM), Dwarf Baby Tears(HC), Rotala Rotundifolia, Ludwigia Glandulosa, Riccia Fluitans

06-10-2010, 07:34 AM	#3 (permalink)
James0816 James0816's Photo Gallery Join Date: Jun 2009 Posts: 2,455 Feedback: 13 / 100% Said "Welcome to Aquarium Forum" 0 Times Said "Thanks" 34 Times Was Thanked 526 Times in 454 Posts	Re: Air Stones ^ x2 Mainly asthetics. They are also used to create surface movement will prevent the biofilm from forming on top of the water.

06-12-2010, 09:42 PM	#4 (permalink)
Shotgun New Member Manager Shotgun's Photo Gallery Join Date: Feb 2009 Posts: 689 Name: Alex Location: Baltimore, MD My location Feedback: 0 / 0% Said "Welcome to Aquarium Forum" 183 Times Said "Thanks" 110 Times Was Thanked 180 Times in 138 Posts	Re: Air Stones for one, some people find that they look good. gives more movement in the tank. it also keeps the water circulated and promotes more oxygenation in the water (although some people say that it doesn't promote any oxygenation in the water) but mainly, people use them for asthetic purposes... __________________ Calling aquariums and fish boring is like calling a hott model ugly. http://www.aquariumforum.com/f2/save...fish-2930.html

06-13-2010, 05:18 AM	#5 (permalink)
Brittrugger Brittrugger's Photo Gallery Join Date: May 2010 Posts: 53 Name: Corey Britt Location: PEI, Canada My location Feedback: 0 / 0% Said "Welcome to Aquarium Forum" 5 Times Said "Thanks" 0 Times Was Thanked 5 Times in 5 Posts	Re: Air Stones Yup what they said. However the oxygenation is definitely real based on physics.

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06-13-2010, 06:27 AM	#6 (permalink)
ChristineS Join Date: May 2010 Posts: 54 Feedback: 0 / 0% Said "Welcome to Aquarium Forum" 1 Times Said "Thanks" 2 Times Was Thanked 2 Times in 2 Posts	Re: Air Stones They definitely do something good, I use them with all my vernal pool critters and the survival rate of larvae (which need about five times more oxygen than than adults) has tripled.

06-13-2010, 11:25 AM	#7 (permalink)
NativeKeeper Banned Join Date: Jun 2010 Posts: 54 Location: USA Feedback: 0 / 0% Said "Welcome to Aquarium Forum" 0 Times Said "Thanks" 4 Times Was Thanked 5 Times in 5 Posts	Re: Air Stones Oxygen consumption, or addition , in your home aquarium is a constant topic of discussion among us fish keepers, but do we really understand what is going on inside of our tanks ? If you are a little in doubt on this issue, you are like most home aquarium keepers. It can be very hard to imagine something that you can't see, especially when the ammounts are so small. Can you really imagine just how small 7 parts per million is? Maybe the examples below, would be useful. Say for example, you have a 135 gallon tank that you've stocked with 5 lbs. of various fish. The water in that tank is 79 degrees, with a pH of 7.0 , as per usual, you tend to feed a bit heavy (We love to see our fishies eat RIGHT !!) . Your fish are fed 1% of their body weight per day . Using well calculated formulas from the aquaculture society, this is how the math works out: Your 5 lbs. of fish will require .9 grams of oxygen per hour. That is equal to 21.6 grams of oxygen per day.These fish will produce .8 grams of NH3-N per day. The amount of oxygen needed by the bio-filter to convert this ammount of Ammonia to Nitrate and make of the bacteria happy, is 5.4 grams of oxygen per day. This makes the total biological oxygen demand for your tank 27 grams of oxygen per day. Now, what is a simple source for this oxygen. Air stones are by far the least expensive, and the most efficient way to aerate and add oxygen to the aquarium. Aeration can take place in the tank, filter, sump, or protein skimmer if youre a saltwater tank keeper. It makes no difference where the oxygen is added into the system, as long as it is present in adequate ammounts. A pretty small, high quality air stone, will add a little less than .10 cubic feet of air per minute. Three of these stones will add 1.8 grams of oxygen to the water per hour, 43.2 grams of oxygen per day. Oxygen saturation happens somewhere between 6 and 8 parts per million , this number depends on the temperature, salinity and elevation where you live. That means that the water molecules have absorbed as much oxygen as they can hold under those conditions. Any oxygen taken in beyond this point will be released back into the atmosphere with very little disturbance of the water. 75% oxygen saturation is not un-common in a well aerated aquarium, while 95% is almost impossible to achieve. Since your tank has an oxygen demand of 27 grams, and the air stones are adding an oxygen level of 43.2 grams, there is no danger of a low oxygen stress condition. Your tank will use and store only a certain amount of the available oxygen. And while its true that you can have a large amount of surface area in your biofilter, it is very unlikely that the bacteria will use all of it. Remember, that the nitrifying bacteria are present in levels that are in direct proportion to the bioload of the tank. It doesnt matter to the bacteria how big your filter is. If they need and use only 10% of the surface area, that is what they will use. About 80% of the tank’s oxygen demand goes to the fish, with the other 20% going to the bacteria for the nitrification of organic waste. So, your average fish tank is not using nearly as much oxygen to process the biological waste as you may have thought. While this has been long known by professional aquarists, it has taken a long time for that information to get to the aquarium hobbyist. Both wet/dry and fluidized bed biological filters utilize the same amount of oxygen to process fish waste. Sooooo...... are air stones useful beyond the pretty bubbles they produce????? I vote Yes

06-13-2010, 11:35 AM	#8 (permalink)
Brittrugger Brittrugger's Photo Gallery Join Date: May 2010 Posts: 53 Name: Corey Britt Location: PEI, Canada My location Feedback: 0 / 0% Said "Welcome to Aquarium Forum" 5 Times Said "Thanks" 0 Times Was Thanked 5 Times in 5 Posts	Re: Air Stones Definitely. Well truely it comes down to the O2 demand in your tank and whether or not u need it, but it certainly wont hurt your fish and might save them.

06-13-2010, 02:52 PM	#9 (permalink)
WhiteGloveAquatics WhiteGloveAquatics's Photo Gallery Join Date: Sep 2009 Posts: 2,111 Name: WhiteDevil Location: NW suburbs of chicago Feedback: 2 / 100% Said "Welcome to Aquarium Forum" 145 Times Said "Thanks" 48 Times Was Thanked 412 Times in 384 Posts	Re: Air Stones I keep one running in my co2 injected tanks at all times, they aid the plants and fish at night as well as keep O2 in the water. Yes they do bring in O2 just at the regular rate of 20% which our own air is made up of(all an air pump does is transfer the air in your house to the tank, nothing more nothing less) Co2 is 1% of the air we breathe so in turn it is bringing in O2 and Co2 however its at the 20% and 1% ratios. Aesthetics are for people who dont know what to spend their money on.

06-14-2010, 08:22 AM	#11 (permalink)
bikie8 Join Date: Jun 2010 Posts: 33 Feedback: 0 / 0% Said "Welcome to Aquarium Forum" 26 Times Said "Thanks" 0 Times Was Thanked 0 Times in 0 Posts	Re: Air Stones Thank you for all the input. It sounds like it is a good idea to have then. Do any of you have any recommendations on ones which are quiet to run?

06-14-2010, 09:19 AM	#12 (permalink)
Jasone487 Jasone487's Photo Gallery Join Date: Oct 2009 Posts: 91 Name: jason Location: Queens NY My location Feedback: 0 / 0% Said "Welcome to Aquarium Forum" 8 Times Said "Thanks" 3 Times Was Thanked 12 Times in 12 Posts	Re: Air Stones ive used Aquarium Air Pumps: Whisper Air Pumps a few times, they are super quiet and kinda cheap.

06-14-2010, 09:25 AM	#13 (permalink)
James0816 James0816's Photo Gallery Join Date: Jun 2009 Posts: 2,455 Feedback: 13 / 100% Said "Welcome to Aquarium Forum" 0 Times Said "Thanks" 34 Times Was Thanked 526 Times in 454 Posts	Re: Air Stones They are all quiet to me. I only run them at night while I'm asleep so can't really hear them. ;o)

06-14-2010, 10:39 AM	#14 (permalink)
WhiteGloveAquatics WhiteGloveAquatics's Photo Gallery Join Date: Sep 2009 Posts: 2,111 Name: WhiteDevil Location: NW suburbs of chicago Feedback: 2 / 100% Said "Welcome to Aquarium Forum" 145 Times Said "Thanks" 48 Times Was Thanked 412 Times in 384 Posts	Re: Air Stones I use livewell air pumps, marine metal products makes them. I use the A-9000 mmpweb3 scroll down about 2/3rds the way down the page, its a commercial air pump but it runs quieter then my coralife luft pump does. I like it because its variable and I can run plenty of tanks off one pump.

06-14-2010, 05:28 PM	#15 (permalink)
bikie8 Join Date: Jun 2010 Posts: 33 Feedback: 0 / 0% Said "Welcome to Aquarium Forum" 26 Times Said "Thanks" 0 Times Was Thanked 0 Times in 0 Posts	Re: Air Stones Thanks for all the advice. I have bought a pump and airstone. It works really well. My hopefully last question is about check valves. I understand you dont need one as long as the pump is higher than the tank? Is this correct?I actually bought one (a top fin one) which is terrible and doesnt allow much air through. So I am wondering if I should just return it or return it and get another type?

06-14-2010, 06:30 PM	#16 (permalink)
Jasone487 Jasone487's Photo Gallery Join Date: Oct 2009 Posts: 91 Name: jason Location: Queens NY My location Feedback: 0 / 0% Said "Welcome to Aquarium Forum" 8 Times Said "Thanks" 3 Times Was Thanked 12 Times in 12 Posts	Re: Air Stones you are correct. as for the top fin ones im not sure. i use them just incase, never know and they are only like 2 bucks. got mine off drfostersmith also not sure what brand came in a baggie.

07-15-2010, 11:23 AM	#17 (permalink)
Melvis Join Date: Aug 2008 Posts: 20 Name: Melissa Location: Northampton, UK Feedback: 0 / 0% Said "Welcome to Aquarium Forum" 0 Times Said "Thanks" 1 Times Was Thanked 0 Times in 0 Posts	Re: Air Stones I've just installed one in my 70 litre tank to try and improve the circulation of the water and the O2 levels...it's certainly effective, but I don't know whether the flow is a bit intense for my fish and I can't see any way of adjusting it. Do people usually leave them on all day and night?

07-15-2010, 11:27 AM	#18 (permalink)
James0816 James0816's Photo Gallery Join Date: Jun 2009 Posts: 2,455 Feedback: 13 / 100% Said "Welcome to Aquarium Forum" 0 Times Said "Thanks" 34 Times Was Thanked 526 Times in 454 Posts	Re: Air Stones I only run at night since I run co2

07-15-2010, 01:47 PM	#19 (permalink)
Brittrugger Brittrugger's Photo Gallery Join Date: May 2010 Posts: 53 Name: Corey Britt Location: PEI, Canada My location Feedback: 0 / 0% Said "Welcome to Aquarium Forum" 5 Times Said "Thanks" 0 Times Was Thanked 5 Times in 5 Posts	Re: Air Stones They usually come with valves,or if not you can pick them up pretty cheap and use them to adjust the amount of airflow they produce.

07-15-2010, 05:14 PM	#20 (permalink)
TylerT Join Date: Jul 2010 Posts: 66 Name: Maximus Decimus Meridius Feedback: 0 / 0% Said "Welcome to Aquarium Forum" 0 Times Said "Thanks" 21 Times Was Thanked 5 Times in 5 Posts	Re: Air Stones in a planted tank the plants taking c02 and still release o2 right? so would you need a o2 pump if you have a tank that has like 5 plants in it?

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