C series/SunSun owners beware

Cory Keeper

Cory Keeper

LED Guru of Aquaria Central
Aug 7, 2007
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To anyone owning a Marineland C series or SunSun canister filter, a word of caution.

DO NOT ATTEMPT CO2 INJECTION VIA THE FILTER. I have recently discovered the cause of why my filter was louder than it should have been within the past week.

The way the filter is designed, location and orientation of the impeller will cause air to be trapped at the top in the magnetic portion, at the end of the impeller shaft. Now its fine when you open the filter for cleaning. Its not fine when all the CO2 does not dissolve before it reaches the impeller.

I currently have my impeller sitting right next to me. The carbon bearings it uses next to the fins are fine, no movement on the ceramic shaft. The magnetic portion OTOH wobbles quite a bit. This leads me to believe the CO2 injection I was doing at one point and now starting it again has lead to my filter being rather noisy. I have replaced it with a spare and I can't hear it over the two computers in this room, and they aint noisy one bit.

Word to the wise, have a spare impeller for your filter on hand. Never know whats gonna happen.
 
I assume this was from injecting CO2 via the intake rather than the output of the filter? I can't image why/how it could affect the impeller if it's going through the output, but I've never actually injected CO2 and am not sure how that's setup. My understanding was you could do it through the input into the canister and then out or hook it up to the output hose, bypassing the filter housing.
 
Cory Keeper said:
To anyone owning a Marineland C series or SunSun canister filter, a word of caution.

DO NOT ATTEMPT CO2 INJECTION VIA THE FILTER. I have recently discovered the cause of why my filter was louder than it should have been within the past week.

The way the filter is designed, location and orientation of the impeller will cause air to be trapped at the top in the magnetic portion, at the end of the impeller shaft. Now its fine when you open the filter for cleaning. Its not fine when all the CO2 does not dissolve before it reaches the impeller.

I currently have my impeller sitting right next to me. The carbon bearings it uses next to the fins are fine, no movement on the ceramic shaft. The magnetic portion OTOH wobbles quite a bit. This leads me to believe the CO2 injection I was doing at one point and now starting it again has lead to my filter being rather noisy. I have replaced it with a spare and I can't hear it over the two computers in this room, and they aint noisy one bit.

Word to the wise, have a spare impeller for your filter on hand. Never know whats gonna happen.
Click to expand...

Now you have learned why all my CO2 injection happens on the output of any filter I like to play it safe with some things others not so much.
Although I do have to wonder how yo have yours packed.

I have a sponge and several other layers (ie filter floss and micron pads) that any co2 passing thru would be trapped in to be dissolved before it ever reached the top, If you just have yours packed with bio media then yes bubbles could make their way to the top causing a problem.

Was it noisy from the get go or did it develop over time?

Reason I'm asking is I had a canister that had a small leak in the housing itself not at the right angle or big enough for water to come out but big enough the canister sucked air in. I would dismantle and reset everything and for a few days it was fine then all of a sudden it would start making noise and blowing air out the output. Took me 3 impellers and 4 seals to figure it out.
 
I've been injecting DIY co2 through the c-220 for more than 6 months now w/out a problem. It is still as quiet as it has ever been.

Are you speaking of pressurized co2? I am assembling the parts now for a pressurized setup, but i didn't plan on injecting through the filter with that. Thanks for the tip! I do have a spare impeller on hand already, just in case.
 
I have two 2L bottles and passes through a glass diffuser first, then through the intake. I did this once before, on this impeller. I think I stopped, then started it again. At first it was quiet but it got quite loud at some point. Took me a while to figure out why.

The reason it wore out the carbon bearings was because the top was essentially dry. Impellers do not like to be run dry.
 
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