This is my first post but I've been reading and reading through the tips, suggestions and tricks for days. I can't thank you all enough because you've given me the courage to finally try some new things with my pool - specifically switching out the filter medium (which I think needed replaced).

Anyway - this year I opened my pool to pond green. After several bags of shock it's now a cloudy blue which I believe to be dead algae. I flocced and waited. Still cloudy - but with the new filter medium and another dose of shock I am waiting it out for a day or two to see if it will clear up.

Here is my real question - if anyone has any suggestions. Right now I am running a 17K gal above ground pool with chlorine and a Nature2 (yes- I think I got suckered too).

I want to switch to the BBB but don't know if I can with this Nature2 cartridge installed. Can it be done? Should it be done? Should I wait until I get the water clear first then switch? Will switching get the water clear?

I'm headed out to get my own water test kit at the Wal-Mart tonight because- like everybody- time is ticking on a family party coming up in 5 days.