Fluval FX5 using as carbon filter

[paddyob]

Originally Posted by tang daddy

It would be fine to run carbon and rubble in it, however you should just sell it and buy 2 phosban reactors. The fx5 is way too much flow for gfo, you want the water to flow through the reactor slow so it can react properly with the gfo to remove phosphates.

+1. I think it's way too big. And the maintenance on those filters sucks.

[Magickiwi]

I would do as others suggest and sell it to buy a dual chamber reactor to run carbon and GFO. GFO needs a certain dwell time for it to be effective. Unless you're running a monster tank that would be a lot of carbon for your system too. The trays would hold five times as much as I would use for my 90g system.