Quote:
Originally Posted by bennyjam
Duffusing through an my hob filter but I feel like it could be better.
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When injecting CO2, you really shouldn't be running a HOB filter because it causes turbulence at the surface which will strip the CO2 back out of the water. For large tanks, canister filters are preferred with the outflow being aimed to not disturb the surface too much, while internal filters are good for small tanks.