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I am going to have a 90 gallon tank soon. I was wondering what part of tank are considered as high/medium/small flow if i am going to put 2 of my powerheads (a 850 GPH) from each side of the tank. to make a circular flow

I am thinking high would be very near power head and then medium probably at the middle of the tank and low would be the end of the tank. But i am not sure if 2x850 GPH is best or I need higher or lower power head. I have lots of LPS that requires medium to high flow, but not sure what is consider medium or high for them.

Thank you for your helps
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Infant prilosec

No comment on the flow thing but just wanted to say Yay for you on the new 90! I so wanted that set-up but timing just wasn't in my favour! Good for you and looking forward to pics!

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Thanks Carmen

You have a very nice tank already. I am looking forward to bring home that tank and took some pictures once things are clear. Probably need more LR

Cheers
Tai
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FACK TUBE

I used a AC 110 power filter, rated @ 500gph, a Tunze 6080 stream pump @ 2200gph and a Hydor stream pump rated @ 1200gph.

This was for both sps but also when the tank was full of soft corals. Never kept many of the softer lps though.

had a 75g with 3 MJ1200 and another PH about the some size. Would call low flow but the Xenia and polyps I had then seemed to like it.

For a idea what others have for flow, see this thread.

I wouldn’t use regular powerheads in an lpa reef. The narrow current is not recommended. Use flow/ stream pump such as Tunze, Koralia, Rio, sunsun etc