Yes I did, a powerhead in a 75 gal as Walstead recommends circulation or the water gets stagnant.

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What it implies to me is that it is not the setup that changes the ph, it is the lack of what most people would call normal maintenance. So then are you saying that it is not plant action, as you call it, that is causing a continuous rise in your ph, but more the fact that you lack filters and circulation? These don't affect ph in a "normal" tank that I'm aware of. Circulated water will help settle out a ph after it has come out of the tap, but once it gases out, its all the same.

Again, the mere fact you question a particular setup item means that it is your method that causes the ph rise, nothing more. This rise does not happen in any other tanks that I've read about. Why doesn't Walstad mention that plants cause a high ph? Any idea?

Nope

Is was coming out and saying it.

Just looking for differences in methods.

I always thought that circulation was for air gas interchange.

If "my" methods do result in co2 values lower then surrounding air, then circulation would increase the water co2 values and decrease pH.

But this wasn't the case in my marine tank where pH rose from 7.5 to over 8 a day after adding macro algaes. That had plenty of circulation. And kH values only slightly higher then my peat moss FW systems. (But much lower than my sand only Fw systems).

my .02

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fw leiden since 1979, fo salt since 1979, mixed reef 55g 2002-2009. Strong emphasis on the tank taking care of itself. Balanced with plant life, no water changes, tap water, no filters in FW. Only dosing calcium, alk, mag in marine reef tanks. http://www.aquariumforum.com/f15/my-...ods-26410.html
recent tanks (till 2009) 7 years- 10g FW leiden 7 yrs, 55g mixed reef 7, 2 yrs, 20g FW leiden, 10 g fw leiden , 29g mixed reef, current tank 55g leiden

Going back to what you said about high ph means low CO2 and vice versa....still not quite getting how you are figuring that?

I realize that if I take two containers of the same water and inject CO2 into one of them, that container's ph will lower...and in this example what you say would be true.

However, it doesn't work wehn referring to any ph value. For instance, my tap ph is 8.2, but once it goes through my RODI system the water comes out at 6.8. By your description of ph it sounds like my RODI system just injected a ton CO2 into the water.

Again, if I take your tap of 7.0 and my tap of 8.2 and aerate them both for 24hrs they both now contain the same amount of CO2, but their values have probably changed by .1 or less.

There it is...if it is your methods that create the situation, then just come out and say. From my POV, methods should not matter unless it is those methods that cause the situation. When all is said and done water is water, plants are plants, and an aqaurium is an aquarium.....we are the same in that respect. But if what you describe is not seen by anyone except you, then it HAS to be the method of maintenance or running of the tank that causes it. Your plants are no different than mine, and the things that affect ph are the same in my tank as they are in yours or anyone else's.

I love my fish and I like my tinkering and OCD tendencies. That's all there is to it, as far as I'm concerned.

Different people have different methods. Just because somebody's methods don't make sense to someone else (for example, some guy on the forum mentioned using barley concentrate as a fert or something weird like that) doesn't mean they're doing anything better or worse than me. Different ways, same result (well being of the fish).

Only time I would say bob's method would cause any harm to the fish were if he were to transfer them to a maintenance-intensive tank after a prolonged period in a bob tank. Osmotic shock would be a problem, as would the potential introduction of disease (like the Spanish Conquistadors and the Mayas). Otherwise, pH rise or no, as we've seen and preached many times before fish can handle a very broad range of water parameters so long as they are kept stable.

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Wow.....crickets. I would have thought there were very simple answers to my questions. Guess not.

agreed 100%..i have not ever seen that in any of my tanks.

Rick

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+5

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