How many GPH with my 90 gallon?

[chris009]

I tried to find some info on this but couldn't find anything. How many times should my tank cycle in an hour? My local fish dealer told me 6 times an hour would be enough. Just wondering if this is correct.

 

[kevin34]

If this is a reef then your LFS was way off. For a reef usually a 25X turnover per hour is good so 90x25=2250gph total(this includes all powerheads, return pumps, etc.). If this is a fish only I think that 6 would be enough because the current wouldnt need to be that strong.

 

[joncat24]

depends on what type of corals you are keeping.
10x---fish only
20x good for all corals except sps
30-50x for sps corals.
Just for reference, when I had my 180 going, I had approx 7500 gph flow from various sources.

 

[chris009]

So the flow of water in the main tank should be that high. How about the flow of water from my sump to my main tank?

 

[joncat24]

I would run a mag 9.5 from your sump to your main tank as a return pump
then I would add a couple koralia 4's, one on each end for additional flow in your diplay tank