filter

[Hopps]

Hey, I 've had a cylinder Eheim filtration system and was wondering the proper cleaning techniques involved. I've washed off the sponge part but besides that what else is required.
Also I've had a group of polyps and a plate that died very close to eachother and wondering what might do them both in at the same time
Thanks

 

[yote]

On you canister,just make sure your getting all the gunk out of it.
As for you polyps and plate,what are your water parameters?