The tank has some sand with the gravel but I guess it isn't enough. Should I add more or just ditch gravel altogether. Since I am getting a bigger tank I will need a new filter I heard that the magnum, fluvals, and eheim are the best avail. I have one rock w/ large holes, should I also "build" caves using rocks (piling them up) I know they like caves which is why I have driftwood w/ holes and a small cave (blue one) but I wasnt sure exactly how to assemble. I know they are juvis and will soon outgrow them. The PH last night was 7.4 I bought A product for african cichlids called PH up to 8.2. I will pick it up today to add.