02-26-2007, 04:30 AM
Join Date: Jul 2006
We haven't had that problem with our el naturel tanks. . As Erik mentioned, you could add some circulation if you wished. But Walstad (the expert on this sort of tank and the author of that book we brought) suggests to not have much circulation. Originally she said you didn't need any. It comes down to the fact that every tank is a little bit different. We have two 20L tanks that have almost everything the same, but growth, water parameters, etc. are a bit different. I would try without circulation. If you go beyond the 1 inch of fish per gallon, you will need circulation and perhaps some filtration, like we do on our goldfish tank.
Originally Posted by brynnhilde
I defintely appreciated the talk. Now I have a use for my 5-2 1/2s. I think this Spring I will check out the ol natural. The only question I have is about the lack of current in the water. I heard the plants could develop a film on the surface that could inhibit photosynthesis from stagnant water. Is this true?