Was wondering if there is a off brand cartridges in bulk that can used in place of the Fluval 3-pack? If so, is there a particular brand that will work and where can they be bought from.
I'm pretty sure it's the same as the Fluval. If you buy these in bulk they get really cheap. I think I saw someone's Amazon Review that they were using them on the Fluval.
Maybe buy 2 pack and see how it goes before buying bulk.
Follow-up: Oops thought you had the 88G one (saw the post above mine), not sure about 20G
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