Aquarium Forum banner

1 - 7 of 7 Posts

·
Registered
Joined
·
29 Posts
Discussion Starter #1
I'm getting my plans together for my next freshwater tank. I was thinking of incorporating the old school undergravel filters for pumping filtered water back INTO the tank. Water would drain out of the tank via an overflow, filter in the stand and get pumped back in the tank from below the gravel bed. This would hopefully create a slight but steady updraft which might keep some of the crap and excess food from settling in. Some of this waste would end up in the filter as the result and would cut down on the gravel vacuuming required. Any thoughts?
 

·
Banned
Joined
·
1,323 Posts
The same effect can be done by attaching a powerhead to the uptake from the undergravel filter and running it into a canister type filter intake spliced to accept the intake from the powerhead but it is a complicated set up if you don't have the right connections. EHEIM has Prefilter that you can use the connection to attach to an undergravel filter and it will convert to a type of connection like you described to do this and keep your gravel cleaned underneath instead of using the connection that they supply to use for the filter end but it is kind of a different type of thing to get right as the connections of an EHEIM are generally an off size so you need to splice tubing to get things to fit but it works great if you get it together. You just have to do canister maintenance a whole lot more often.

Rose
 
  • Like
Reactions: JIM

·
Water Chemistry/ LiveBearer Specialist
Joined
·
343 Posts
A reverse flow UGF is most often called a RUGF, cschauerj. Yes they are done by some people but it is something that I have no experience doing.
 

·
Banned
Joined
·
1,148 Posts
this sounds very much like a sand filter on a swimming pool, with one exception, you can periodically back flush a sand filter to clean out the junk. In this set up if i understand it correctly, you would have no way to clean it other than dump it and start over. A good idea i think, in theory, if you can figure out an easy way to clean the filter media, frequently, otherwise youre creating a good place for waste to decay, and go back to your tank as a liquid.
 

·
Registered
Joined
·
42 Posts
I had one(reverse flow undergravel) years ago on a 55gal. It did save on food waste- the food would roll along the top of the gravel & get eaten instead of sucked into substrate. The downside was dealing w the canister filter, ugh. It was tricky to set up, and tricky to clean, and seemed to need cleaning alot. Plus when I vaccumed the substrate there were always pockets of nasty junk.

Now I have a bio wheel & sand w plants.. works great & food rolls along the top of the sand, filter is super easy to clean & supports a big bioload.
 
  • Like
Reactions: JIM

·
Registered
Joined
·
43 Posts
I have no experience with gravel filters and I don't want to try as i read this:

‘‘In nature there always is rotting stuff in the gravel. This produces a warm "bedding". the plants will enjoy this effect in the aquarium too and they will show by growing faster and bigger. This effect can be reached by gravel heaters. But if you have got a gravel filter, the streaming will make a colder bedding, and the plants will grow less or even die.’’

So I will never try till i heard story's saying this is not true.
Or maybe in a Tanganyika- or Malawi-tank.
 

·
Registered
Joined
·
29 Posts
Discussion Starter #7
Thanks for the thoughts. I plan on using a wet/dry in the cabinet so I figure maintenance will be easy - just rinsing the filter pad. I also have no plans at this point of planting anything in the tank. Might just work.
 
1 - 7 of 7 Posts
Top