Ok, I have a 29 gallon, with a stand that can accomidate a 20 gallon tank below. I'm going to try and make a sump below. I was reading the article about sumps, and I was going to make an over flow box using a specimen container
(here is a link to what I have http://www.amazonmoosey.com/tek9.asp...cific=jqimkqr4
I also have a 20 gallon tank.
From what I understand, all I need now is a "u" shaped hose that runs down into the 20 gallon, and a pump and hose to return it to the main tank.
Now for the problems that can happen, If I put only 15 or so gallons in the 20 gallon tank and have the hose that comes from the main tank only about 2 inches below the surface of the water, even if the power should go out or the pump quit, the water will run down into the sump until the syphon has stopped because of low water level. Ideally the sump will not over flow so I just have to figure out how much water I can put in the sump, right? Sorry if this question is confusing.....cause I'm a little confused.