hi i am about to get 3x1200 maxijet powerheads and adding a fourth later to circulate my 38x20x20 tank with a 30x15x15 sump were am i best putting them in tank and what time should i run them at i thinking of putting 2 each end and running via system220 wave module for 6hrs one end then 6hre other end also do i need calm periods if so for how long
Save your money and get homebase value basic timers you can get 4 for about a tenner.
I would position them through out the live rock so they can be easily accessed for maintenance also you will need a sponge over the intakes to prevent inverts being mashed.
cheers alam already got the wave maker system 200 with 4 outputs also have 3 system 2000 power heads rated at 2000lph but make a bit to much noise for my likeing