Wow..... just wow..... Well finally after doing a lot of searching my tank I found the main leak and it actually wasn't under the tank lol. Apparently it was a crack that came with the biocube the first time i got it (the mailman is a bastard and doesn't handle with care, so to speak). I had actually felt that crack and got a cut form it when we were building the biocube, but I didnt think it would be such a serious problem, and my dad told me not to worry about it. looks like it ended up screwing up my tank for a while but im gonna cover it with silicone; besides, the filter area is kinda drained in the sens that all the filter water is in the biocube's third chamber. FINALLY I've found my problem!!!!