well im going to go completely hog wild on the 75, i need new filters, new heaters, new hood, new lights, new stand, and i think what i will do is take the tank out empty it out, and use pool filter sand? what kind of filtration would you recomend for me to use with the dats in a 75 gallon tank? i try to keep my tanks around 82 degrees as my fish like that (the fish in my 125). what kind of decor would a small dat(s) like? driftwood so they can hide, semi open? im not sure about how the tank should be set up to make them the happiest i can make them