Wondering how much water flow is right??

[saltfin]

Flow probably applies to all forums and I'll try this one too. Thanks.
I'm wondering how much water flow my fish, inverts, soft corals, etc. (basically my tank) might like. I have a 75 gal long hex with coral sub but a corner of ls, 30 lbs. Lr and I'm starting some soft corals that 260 watts of compact light will allow. Between my canister filter, protein skimmer and a ph I have 615 GPH. Is it important to turn on/off say the power head some ar just let everything stay on a roll. Thanks

 

[saltfin]

Thanks, I am changing out my lighting this Fri from 80w flour. to compact lighting 260watts. Do you think that much light will help my new yellow polyps grow/spread? I want to get some other low light corals as well. Any sugestions/info?? I use 10 hour days with only my blue 50/50 on for waking up first 30 min, full lighting for main period then only blue 50/50 for last 30 min. for sundown. I use lamp timers to turn lights off/on automatically and feeding times. As I fugure out the water flows I will do the same. I'm not sure wheather to mostly have all power heads on or say maybe 15 min. out of an hour. You have great tanks I saw your sight!