FluvalFX4/FX6 Filter Ammonia Remover Pad, White

I have absolutely no idea, why these come in packs of 3? I have the fx6, so I require 6, to fill the trays. The fx4 requires 4? This is not too bad for me, as I buy to packs and sorted, the fx4 owners must be fuming? Why not pack in two's makes much more sense?These are relatively expensive for what they are as well.

These seem to be the perfect compromise between filter floss and nothing at all.I was finding that my filter floss was clogging within a few days and the flow was slowing down so much that the oxygen levels were getting dangerously low. I had to keep pulling the fx6 out and cleaning it every two to three days, and any of you reading this that already own one will know that it's quite a pain to lug around.I have just done my first 7 days with these, and they were brown and full of particles, but the flow of the filter hadn't slowed down at all, so I'm very impressed. They obviously don't catch quite as much as fine floss, but they stop your filter from slowing down to a trickle, so for me, these are the perfect compromise.I have also found that they don't seem to fall apart like the floss once they have been cleaned, they seem like they will last a long long time before they need replacing.I couldn't recommend these enough!

Liked: Fluval quality and perfect for for my FX4.Disliked: three?! The FX4 has 4 and the FX6 has 6 but you can only buy packs of 3. So if I wanted to replace all 4 in my FX4 I’d have to buy 2 packs and I’d have two left over. Utterly ridiculous.

These get blocked very quickly and I notice the flow rate diminish fast I would not use them again. I did have fine floss media underneath and it was only around the sides that water had hit it note my bio load is light and I have 3 of them running on my 150 gallon so now that I have removed them and use double fine floss I can easily not maintain my filters for 4 months on a rolling cycle.

I think to be honest that too expensive for what they are however obviously we pay for the brand.They're good enough and work perfectly fine as expected.With regular maintenance they just clean out quite thoroughly with a simple rinse in some aquarium water.