Just got back from having my water tested at the pool store (against my better judgement) and they told me that I had a very high phosphate level in the pool (900 or so). I have been having problems keeping chlorine in the pool for weeks now and they believe that is the reason why. Has anyone here ever heard of a high phosphate level preventing a pool from retaining chlorine?

BTW, here are my stats:

FC: 0
CC: .2
pH: 7.5
TA: 130
CYA: 19
CH: 230