Question about GPH Flow

salttanker · 03-26-2004, 04:58 PM

hello all - I currently have a FO 90 Gallon tank cycling and just wanted get your input on how much flow I should have regarding GPH. Any ideas? Or maybe you have a formula you all use to estimate? Thanks all,

Mike

the_blue_tuna · 03-26-2004, 05:28 PM

As a " general rule of thumb" a tank requires 10X its size per hour in circulation , therefore your 90 would require 900 gallons per hour in movement. Then you have to take your particular circumstances into consideration. Some things may not like that much movement , still others will require more. In a F.O. tank my best suggestion would be to make sure you have no large dead spots and you have sufficent surface agitation , for oxygen/gas exchange. If you have LR try to make sure you have flow on both sides (front and back) of it . I would be more concerned about these things and less concerned about total flow. Hope this helps.

salttanker · 03-26-2004, 05:34 PM

Thanks for your feedback. It is a FO tank with no LR right now. I might add some later though. This definitely helps me determine if I have enough flow in the tank. Thanks again,

Mike

03-26-2004, 04:58 PM	#1
salttanker Citizen Join Date: Mar 2004 Location: Gilbert, AZ. Posts: 106	Question about GPH Flow hello all - I currently have a FO 90 Gallon tank cycling and just wanted get your input on how much flow I should have regarding GPH. Any ideas? Or maybe you have a formula you all use to estimate? Thanks all, Mike

03-26-2004, 05:28 PM	#2
the_blue_tuna Governor Join Date: Apr 2000 Location: colorado Posts: 1,207	As a " general rule of thumb" a tank requires 10X its size per hour in circulation , therefore your 90 would require 900 gallons per hour in movement. Then you have to take your particular circumstances into consideration. Some things may not like that much movement , still others will require more. In a F.O. tank my best suggestion would be to make sure you have no large dead spots and you have sufficent surface agitation , for oxygen/gas exchange. If you have LR try to make sure you have flow on both sides (front and back) of it . I would be more concerned about these things and less concerned about total flow. Hope this helps. __________________ In this hobby patience is not a virtue,,,,,its mandatory. Jim's Marine Links

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03-26-2004, 05:34 PM	#3
salttanker Citizen Join Date: Mar 2004 Location: Gilbert, AZ. Posts: 106	Thanks for your feedback. It is a FO tank with no LR right now. I might add some later though. This definitely helps me determine if I have enough flow in the tank. Thanks again, Mike

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