I have 2 6045's on my 90gal and 1 6025 on my 22gal. I have been very happy with them so far. The 6025 in the 22 gal is almost to much. I am still playing with it to keep it from moving the sand around. It should be great in the long run because I would like to put SPS into that tank. The 2 on the 90gal tank work out great. I have those and my Mag12 (dialed way back to about 500-600gph) and have plenty of flow for my mixed tank. I would definitly recoment them. Much nicer than the MJMod I had.