I'll have to research powerheads.. I am still trying to get my water parameters right...I added 5 4'' rbp's on tuesday they are very active, hungry, and nipping each other. they seem to have perked up the 8'' rbp harry. I have them divided...Harry seems to want to join them.(or eat them...lol) He isn't trying to attack them which I was told to look out for...) The little ones are following his every move. I did add some air stones. they are swimming across the air strip one like its a backyard sprinkler!OMGdickkemp;4211584;4211584 said:i would add at least 2 powerheads to your undergravel filter to add GPH to the filtration and add some current. but yes very nice looking fish and tank.