Iron..another possible mystery source

[willygee]

This was in a review on an economy cartridge filter: Literally crumpled like a soda can inside the filter canister after about a month. The wire mesh inside was completely rusted. Horrible filter.
I personally use the Pleatco filters and am very satisfied.

 

[cowboycasey]

interesting, you get what you pay for

 

[YippeeSkippy]

I've always heard good things about Pleatco replacement cartridges.