I have a 120 gal freshwater tank with an eheim g160 canister filter
And my water is greeny and not clear. I have been told this is suspended
Algae. I have tried chemicals and a max clear product that is pebbles
That go in my filter. Nothing seems to work. I change my fine filter every
Month. The tank is only two months old so I haven't reached the 6 month timeline recommended by eheim to start changing other parts of the canister. I remember having this problem in another tank and it was a spent charcoal filter. So I am wondering if I should start changing my other filter internals like my bio or course mechanical. Any suggestions would be appreciated.

My water parameters are all in spec as I have been doing water changes to try to clear the water. I also add aquarium salt and have live plants