Do you need a powerhead for this to work? My tank is starting to get a lot of snail and fish poop on the bottom. DO I need to get a powerhead or will the bacteria take care of it? Also what is detritus and what can I use to get rid of it???
If you're not running an external water pump on your saltwater tank, I think you definitely need powerheads (multiple) for water movement. You're gonna get stagnant areas of the tank that'll become cyanobacteria heaven (red slime algae).
That's good! Cheato will certainly help. I don't know about the PH - should be ok. What's your pH lights on? And have you measured it with lights off yet? How much other vegetation do you have? I shouldn't imagine some cheato would affect it that greatly would it?