WoodWitch is on the right track- but you also need to do 1 of 2 things.
A) Take a small drill bit and bore holes approx 1/2 in apart, like a peg board. So that water can freely flow (this is the best approach- but more time consuming)
B) Get a second pump & filter set up (if you do not, your water will be stagnant, and your fish will die)
I have done both, I suggest the first method- If you want further instructions about the easiest way to do it, PM me. :)
I used to keep several very large fresh water tanks.... You know, I would really love to do that again! hmm... :)
at 10:24 AM on Aug. 6, 2010