I recently picked up a 75 gallon tank at my LFS , didn't give it much thought till I got home but it has a corner overflow .... I plan to filter with my fx5 off my 150 gal that im planning to get rid of and I have no plans to use a sump ..... So my question is what is the best way to plug the holes ( in bottom of tank ) so that I can sleep at night knowing I'm not gonna wake up to a puddle of water ? 

