Canister help

I have a cascade 1500 canister filter and the thing makes allot of noise, all the trays is in correctly and filled properly. Please if there is any one that can assist please help.

 

Have you checked that the impeller runs unobstructed, check the impeller drive shaft, make sure it's the canister, the water flow through return pipe can also make a whining sound. Perhaps take it to your lfs let them check it out...

 

Coukd it be there is some air inside the canister?

 

i have tried to move the canister form side to side to get all the air out but there could be some left.

 

Can take a while before all is out. Otherwise check the ax of the impellor (could be broken).

 

What kind of noise is it making?

 

Used to have problems with air in my canister as well.
I simply connected a small pump to the intake of the filter.
Each time there is air i switch the pump on for a few minutes,until the noise stops.
Also your canisters position should be below and NOT at the same level as the tank.

 

Ot snail !!

 

??? Huh? Says who? I can't see any reason for this statement and totally disagree. Put your intake and outflow below the water line and there won't be any reason to do what you suggest. Even if the outflow is above the water line it won't really matter except that when the power is cut or canister switched off, some air may get into the piping and possibly canister. But that would only happen if the canister top was above the water level line.
I run one of my tanks with the canister on the same base than the tank for over a year now with no ill effects. Actually it is better for the canister at startup as it doesn't have a air purge/prime 'button'.

Coming back to the noise, the usual culprits are air in the canister or pieces of media (broken pieces of ceramic noodles or matrix or the like) and/or snails or foreign matter (substrate or other stuff) stuck in the impeller chamber.

 

To me a canister has to be under waterlevel of the tank as well. It only willl pump water out and is syphoning in. It will stay full cause of the law of the communicating vessels. Or did I misunderstood?

 

My cascade canister 1200 was also a bit noisy sound like there was air in it all the time even if i prime it. So i took it out opened it at the trays and in my second tray i put more filter floss. On putting buck I connected tje inlet and opened it so the water filled up till it almost came out the outlet. Connected my outlet and opened the tap a little and pump it and pluged it in. So it looks like after I added more filter floss it very quiet.

 

My canister is making noises and sucking air when i keep it at the same level of the tank.
This also happens when i do water changes and the water level drops.
There are many different types and makes of canister filters,i have a aquah2o acf-2000.
So if yours doesn't do that,then i am happy for you!
I'm only trying to help out another member with my personal experience that i ve made with my equipment.
!!! I hope you can except that!

 

@DoubleDutch -while I don't fault you on what you said, I however would like to point out a few things.
-The law of communicating vessels only applies as long as there is no air in the piping.
Once there is air in the system this air (or most of it) needs to be pushed/pumped out for the syphoning effect to take place again.

-I didn't suggest it was a good idea to install a canister 'above' or 'way above' the water level.
But I reject the claim that the canister "must" be installed under the tank as suggested. The bigger the height difference, the more the pump has to work to get things going again after air has gotten into the system (for whatever reason).

What is wrong having the canister sitting on the same level as the tank? In most cases the tank (and as such the water level) will be higher than the canister anyway.
@TheEel -I can accept that you are trying to help a fellow member.
But as an engineer I think logically, so looking into wrong places isn't helping to sort out a problem.
By your own admission (your first post), your noise was related to air getting into the canister and you solved this by installing a pump in the inlet and switching it on for a few minutes until the air is pushed out again.
Now having said that, we have the cause of your noise, ...as many people have already stated here, air is one of the major reasons for noisy canisters.
So we should look at how we prevent this and a few things to check out would be:
-keep your inlet and outlet below the water level at all times when the filter is running.
-make sure your connections to spray bar etc as well as valves are airtight. I discard the plastic connectors and use stainless steel hose clamps on the canister side.
-check your assembly, especially the main O-ring to make sure no air can get inside.

Let's keep it simple, the canister has only one working/moving part, the pump's impeller. So where will any noise come from? The impeller is supposed to be intact (no broken off 'paddles') sit submerged and work in water, not air, snails or little stones.

Finally, it would be interesting to hear from @Markus whether/how he fixed his problem.

 

i have checked the impeller and cant see anything wrong there. The noise comes and goes now that i have cleaned everything. I will still see what i can do to make it go away. Maby i just need to get an new impeller.

 

One last thing before you go buy a new impellor, check all your fittings even the elbows and o-ring on your(intake) pipe, had same problem and i discovered a hairline crack as well as ashot o-ring on the hard plastic pipe, it drove me crazy till i actually dit a pressure test on the pipe and finally found the problem

Good Luck