what to do with an eheim 2215 canister filter?

[nickels]

I have an eheim 2215 canister filter that I am not currrently using and would like to convert it inot a possible calcium reactor or phosphate reactor. Or should I use it for additional filtration. Any sugguestions would be great. It is currently sitting in my closet taking up needed space.

 

[nemonick84]

I'm gonna tag along on this as well. Here's a bump.