i'm just using a small 10 gallon tank to house these 3 piranhas as juvies but i was curious as to how often i should be cycling the water...i would imagine it's more of a prominent issue in such a small tank, i'm hoping they grow quickly so i can move them into this 55...but i'd like to keep the water levels appropriate, i need to start testing nitrate levels i suppose...what is normal...hopefully 80 degrees F is adequate for them as well..any information would be much appreciated 