This was always something that we discussed with customers in the store and I do think a fair few issues in your aquarium could come down to thinking your filter is working when it's actually not.
The @fluval FX2 has performed very well through this 3 month period, but it definitely performs better when the sponges have space to catch the muck!
It was quite a surprise how much of a difference this made to the rare tetra aquarium and even now when I stir the aquarium up it clears within seconds rather than still looking murky an hour later.
So remember, just because your filter is flowing, doesn't necessarily mean it's working!
P.S not sure what happened to my hair towards the end hahaha.
