Originally Posted by Glomgold
Thanks for the reply. So SW
tanks absolutely require a minimum flow rate?
Flow within the tank is quite important for gas exchange, pH and detritus accumulation to name just a few. At the minimum, shoot for about 10x the volume of the tank. So if say a 75 gal
, you'll need 750 GPH
from your combined water moving apparatus not including the skimmer (if you get one).
Could that be accomplished via a filters water return valve?
Depends on the filter and or return being used. It is more tham possible to accomplish this via return pump from a sump or closed loop system. Just be sure to properly calculate head loss.
If talking in terms of HOB
or canister filters, they shouldn't be relied on depending on tank size. Once/if media is used, detritus and food accumulation will impede water flow not to mention the media itself. They can be used to "augment" the flow but I would definately not rely on them for all the flow.