11-19-2006, 04:38 AM
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Cool idea, we have a set of "cube tanks" at our store here, they are 3 tiered cubes and 1 feeds into the other. With good lighting and plenty of water changes regularly, it grows everything like weeds. It was set up to show the ecosystem of a natural riverbed. The top cube feeds to the one below it, and so on... and with this running, the bacteria takes care of the filtration by itself. If the water starts at the bottom and has to work it's way up, it will put more strain on the pump, and it will also tend to send "muck" to the higher tank, where it will settle instead of running back down to the bottom tier. It is the course of sediment distribution as in a natural riverbed. The tanks I am speaking of are 3 seperate tanks, side by side with drain pipes to connect them. If I get to the store again soon, I'll try to get a pic of the set up for you. I always had a lot of fun playing with that setup. We ran CO2 into the top cube, and although we had to deal with a bit of hair algae, it was well worth it until we got it regulated properly.
As for plants... that will depend on the size tank you end up going with, and also the type of lighting you're planning to provide, and where that lighting is located, how high up above the tank, etc. Same thing goes for pump size... better to decide for sure what size tank you're planning before trying to determine the filtration, circulation, and lighting. Tank size will say it all.