Quote:
Originally Posted by Frolicsome_Flora
any filter system will use some O2 as thats how the nitrifying bacteria metabolise. Canister filters, unlike a sump arrangement, will not replace any lost O2 with water exposure to the air, obviously. surface movement is really the most important thing, it doesnt have to be much either to make a massive difference.
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I'm rather fond of surface skimmers, and the Eheim surface extractors. The latter is quite capable of keeping up with the average trickle filter for dissolved oxygen but you do have to increase the flow rate a bit.
Personally I feel as long as the current doesn't uproot plants or blow the fish out of the tank "Have at it " !
You develope a knack displacing volume discreetly.
It is really quite amazing just how well brisk surface movement increases the O2 level as well as any trickle filter. My pet peeve W/ trickle filters is that the gravity drain of the overflow tends to impede my prefered flow rates. I can easily push 700gph. through a 65 gal. given half a chance !
Grtz, Prof M