I have a 55gal comunity tank which has 6 clusters of plants (nothing heavy but enough for cover) a large piece of bog wood. I do weekly 30-40% water changes. ph 7.8 0,0,30. I just got a new light fixture a 48" quad tube 216w, 26800k. I have Stocked w/ 7 2-3" Rainboows, 3 3" Angels, & Harliquin...