Fish i have 2 blue angel , clown 2 ,1 yellow tang ,1 six line wrass, 1 brown eye tang .I get deatris but it is easy to remove when I do my 2 week water changes.The tank is BB so no problem removeing deatris . Flow is provided by iwaki 30 rlx , 1 seio 820 ,1 seio 2600 and three top power h eads .