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Old 10-23-2012, 09:09 PM   #1
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Power heads

Hey guys,


I recently had an unfortunate mishap where my 125 g tank sprung a huge leak and I was forced to get a replacement tank immediately. Hence the next largest readily available tank size was a 75 gallon. So I am currently using all the same equipment in this smaller tank.

My question is this: I have two hdor 1400 gph power heads in this 75 gallon tank with a mated ocelarous pair (so beautiful!) a cleaner shrimp, and hermit crabs. Will this be too much for the clowns?

Thanks all
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Old 10-23-2012, 09:10 PM   #2
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Sorry bout the 125 but that's not much flow at all really, and welcome to AA glad you found us here
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Old 10-23-2012, 09:32 PM   #3
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Ok good. Is there a rule of thumb for power head "power" to tank size. I'm making this tank a FOWLR tank and may someday move to hard corals so I know the flow needs to be high but how much is too much for the other organisms?
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Old 10-23-2012, 09:33 PM   #4
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And thanks for the welcome
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Old 10-23-2012, 09:38 PM   #5
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Once you start to get past 50-60x tank volume in total gph you would start seeing some swimming issues (not counting weak swimmers like pipefish and seahorses which require very little flow). A fowlr tank should be atleast 10x a soft coral tank 30x mixed reef 40x+ and sps reef 50x. This is a general rule of thumb but works out pretty well in most cases.
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Old 10-24-2012, 01:16 PM   #6
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Perfect. Thanks for the numbers. That's exactly what I was looking for. Thanks for the help!
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