Daniel225
Active Member
So silly question if I have a 100g and aim for a turnover of 20x ( currently no corals in only fish) ( 100x20=2000gph ) now the silly question I have 2 Nero 5 do I run each one at 1000gph or both at 2000gph?
calculating GPH
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Natural_Reefer
Active Member
Not sure if you asking the right question (or I am not understand it correctly). The Nero 5 are power heads so you will run them base on the need of flows for your corals. I would run them opposite each other (anti-sync) and adjust accordingly.
I could be wrong but the turn over rates are often referring to the return pump for the sump.
I could be wrong but the turn over rates are often referring to the return pump for the sump.
edd59
Well-Known Member
+1 i'v read 10-20 times turnover. to reach 2000 gph you would need some pump after adding in head especially with all the 90's people are using for astethics
MaxTremors
2500 Club Member
The common GPH equation is that you want 10x tank volume going through your sump and 40-70x tank volume in the display for a mixed reef/soft coral tank, more for an SPS dominant tank. In my 28g, I have roughly 70x and I sometimes think its not enough. The idea is that you want really wide, turbulent flow, a 1000gph of really wide flow is going to seem like less than 200gph pushed through a tiny nozzle that creates a jet of water, even though its pushing 5x as much water. For a FOWLR tank, I’d still shoot for around 40x, it will help keep detritus suspended so it will get filtered out and will provide lots of oxygenation for larger fish that needs lots of oxygen. Plus it will help them to get lots of exercise which can help avoid fatty liver disease, obesity, and stunted growth.
