Flow/Turnover rates. Help me out !

Dan Fagan

Premium Member
I have always assumed that flow referred to the water movement inside the tank and turnover referred to flow out of/ into the tank via overflows etc.?

After reading a number of threads many folks seem to use these terms interchangably....

Would like to reduce overflow rate in my 265 for noise/energy/heat reasons. I currently use a Sequence 1000 for the return pump. I have Dolphin Ampmaster 3000 on a CL and powerheads as well. Can I get away with using a smaller return pump which will reduce overflow volume ? What would be the recommended "turnover" thru the overflows for an SPS dominated tank of that size ?
 
Not sure if this answers your question, but I am using a 900 GPH pump for turnover (water going to the sump and back) and a 3600 GPH pump for my closed loop flow on my 120 SPS tank. I did this to make everything as quiet as possible.
 
Definitely helps. Thanks. Main goal is to reduce volume into out of sump. I am guessing that I can make up for less flow there with more flow via powerheads etc.
 
Another option would be to place eductors on the sump return lines. The backpressure from the eductors will reduce the flow through the pump (and sump), while increasing the flow in the tank.

If you can find a performance curve graph for your pump, check the flow at around 14ââ"šÂ¬Ã¢"žÂ¢ head (or 10' above your current, static head). That will be close to the flow through your sump. Then multiply that value by around 4.5. That will be the flow in your tank.
 
I used a locline spray bar on my 125bb and a gate valve and through my somp . i used iwaki 40 for my cl . 1 seio 26000and 1seio1100 plus 3 x800gph on a wave maker .hope this help.
 
I have been planning a 180 in the wall for a summer project, and was going to use a Eheim with about 300-400 gph to the sump.The thought of the slower over flow to the sump would help my skimmer pull more from my tank water. The tank will also use a full length weir over flow.
 
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