personaly i would say the only way the drain would get clogged is if you take the screen out or something dead floated into it. not sure about that. as long as you keep it clean it shouldnt clog for a very long time. and the loss of suction i have never heard. if whatever creating the suction breaks then yes. and also the one i set up we did tests on and if you use a power head to get the suction then it needs to have alot of
GPH. we went with the pump it called for. and during power loss your pump wont be pumping anything into the display tank so nothing would be draining. the only way a power loss would be an issue is it the pump you were using to create the suction didnt come back online when the power came on. but in my studies before i atemped a
sump on a buddies tank. i didnt come accross to many chances like that. i would say either the people just didnt like how it was working or another major problem other then just the overflow. i am interested in hearing about them clogging
lol do you have any of those links? the one i setup from CPR has two diferent filters a big holed filter inside of the tank in the chamber and another sponge like filter over the drain hole itself. i love the CPR overflow box. i think it works well...
