best way to clean a canister filter

[Ozymandias]

well i too use tap water but mine is from a well here in NJ and so far no bad side effects. that being said i only usually clean my sponge anyway because i find that my Bio-media doesn't need it. even when i was at school i cleaned my filter media with tap and again nothing bad with my tank.

 

[Ratt45thinf]

I also clean mine with tap water and never had a problem, knock on wood, but a little hint I found was to clean out the hoses i found an old dog chain and fished it through the hose put a rag on one end of it and pulled it through. Makes them look like new again.

 

[Rbishop]

I use tap water...never use tank water.