I hope someone can advise me about my filter. It is one that hangs on the back of the tank, & two cartridges fit in it. Sorry, I don't know the exact name of the filter. I have had it & the tank for about 7 months. About a month ago I moved the tank a short distance into my new apartment. Ever since I have been fighting green water. When I checked the filter recently, it has white mold growing on the tops of the cartridges- the part that is just out of the water flow. I washed off once, but it has come back. Can this cause problems?? Also, should I ever clean out the canister part of the filter? I think it has some propeller thingy & lately it is making a little noise- not a lot, but enough to bother me. I don't think it is normal, because it didn't used to make that noise.
Can someone please advise me?? I have only been keeping fish for 7 mo
., so I am still learning.