Aquarium filter help!!!

[Sharklover]

My filter is a 40-70 aqua clear filter and it works for fw+sw and even though mine is in a 37g freshwater i figured because it can go in sw i would ask my question here because it seems the people in the sw forums know more in general,,,anyway my question is; ive had my tank up and running for about 5 months and i never heard a sound out of my filter but lately ive noticed a moderatly loud humm and once in a blue moon i hear a low discrete crackle,now the only maintenance i have done for my filter was i recently cleaned out the intake tube and i monthly replace the carbon,i also prime the filter properly when i have to turn off/on so does anyone have any idea what the problem is,or how to fix it,and can anyone tell me what else i need to do to keep my filter working properly???---thanks!---

[Purevil21]

A small piece of the carbon may have gotten down in the impeller. Take it apart and check, I used to have that problem all the time with my magnum 350, I just had to take it apart and make sure when I put it back together it didn't happen again.

[EndlersEatGuppies]

My filter does the same thing! I was thinking that there is something like debris by the motor in the filter and it is doing that. If that is the case put your filter cartridge in a bucket with USED aquarium water and then take the filter apart and look and see what u can find. I did this and it stopped the noise for about a week.

BTW don't u have an exact copy of this in the SW forum???

[thominil]

Moved to General Hardware/Equipment Discussion.

When you cleaned the intake, are you sure you repositioned the impellar properly? Nothing is missing or chipped/cracked on the impellar. Also, make sure that nothing dropped into the impellar chamber. You should be able to remove the motor housing if I am correct and Hagen added this to the design, but wait for an actual owner to comment on this.

[thominil]

Merged Threads/deleted duplicate post.

[Mr. Limpet]

I'd suggest removing the impeller and motor, wash the impeller off and make sure there's nothing stuck to it (I use my aquarium scrub brush on it). If you take a Q-Tip and swab out the impeller chamber (careful with the shaft in it), there's usually gunk in there (mine anyway), put it back together and you should be good. I just did all this to my very dirty AC50 and it's running great right now .