Need advise

[damontoy]

Awesome hobby, but not my job. I have a 125gl RR. I have some coral and clams 6 fish. Lights R EVO LED. My question is, What is the size of return pump I should be using so I can have better flow back into my tank. Also I have a power head on each end of my tank and what GPH sould I be using. Please advise. corals are mostly soft

 

[Tajjo]

You don't need high turnover (allows skimmer to pull more) id say go with an mp40 for flow, if your budget allows that should be plenty with softies.

 

[dvenson]

for softies and most lps medium to low flow seems to be the normal but every system is different. For return flow the norm is 5X-10X total water volume. you would also need to account for head loss. if it was my system i would purchase a return pump rated for 10x total water volume and after the head loss you might be looking at 5X-7X turnover rate. i would look at something like the Mag 12 http://www.marinedepot.com/Danner_P...s_for_Ponds-Danner_Mfg.-DN3119-PDPMSU-vi.html . if you really want to get and accurate head loss use the evil empires head loss calculator http://www.reefcentral.com/calc/hlc2.php .