Originally Posted by BBradbury
Airstones don't do much to get oxygen into the tank and remove carbon dioxide. The bubbles are too small and rise and escape so quickly. Provided you have the recommended level of power driven filtration equipment running in the tank, then you have everything you need for proper gas exchange.
Well, I'm not saying all
that is required for healthy gas exchange are bubblers/bars/stones...I'm just saying they aid
in the procedure, and can't really "hurt" to have in a tank (confirmed by the member I replied to just before this post).
A filter with a gph (gallon per hour) rating six times the volume of your tank is sufficient. So, if you have a 55 gallon tank, your filtration should have a gph rating of 330 or better. A single, large power filter or two, smaller ones placed at opposite ends of the tank will work as well.
On my 60 gallon goldfish tank, I'm running on one side an Aqueon QuietFlow 55 (good for 300-plus gallons per hour) and on the other an AquaClear 110 (good for 500 something GPH
) and combined, they turn over some 800 something GPH
if my math is right...is this sufficient for a 60 gallon decently stocked (four fish) goldfish tank?