I have a 2ft cude mix reef tank running with 2500L\H for my reture pump and 2 M620 for wavemaker in main tank.Parts of the position where I wanted to put new sps corals not getting enough flow and also some deadspot.Can anyone advice should I change my reture pump to 3800l\h or upgrade my M620 to m820 to get more flow in main tank?
Thks