Replacing water to get rid of CYA

[grangerhj]

I have been battling an elevated CYA for the past month- found out it was elevated by chance- my pool store must not have tested for it because I never was told it was a problem. Reading of around 150. Have a fiberglass pool and was told by installer that I could not empty it more than 12 "- I have done that twice with very little inmprovement. I waqs swimming in the pool- which looks great by the way, I just have to keep using chlorine- am I in any danger using the pool?:

[cygnusecks]

Couldn't you simply use two hoses: one is siphoning water out while at the same time a different hose is adding new water? This wouldn't remove CYA as fast (and you'd waste more water) but this would avoid having to empty the pool at all...

I've never needed to drain so I'm just hypothesizing that this method would work.. wouldn't it?