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CO2 injection in canister filters

>I am now setting up a 75 gallon with a proper Dupla CO2 injection system.
>DaleCo talked me into buying the Dupla S Reactor for $175.  But now I am
>wondering if I shouldn't just return the reactor to save $175 and route my
>CO@ from the bubble counter to the intake on my canister filter.  It seems
>to be working well on the 37 gal.  But need I be concerned about carbolic
>acid eating up my canister filter and hoses if I follow this method?

Doug Valverde contacted Marineland with this question, and was told that
Magnum canister filters are not adversely affected by feeding CO2 trough
them.  Can't say about those made by other manufacturers, but the Magnums,
at least, are safe.

Karen Randall
Aquatic Gardeners Association