Hello! I'm in need of urgent advice.
We switched to saline on May 1, 2015 and have been having trouble ever since. We haven't been able to get the chlorine up and the water recently turned green so we did a few water tests at the local pool store. First they told us to add CYA, then conditioner, then shock with powder chlorine. The most recent test told us:
Nitrate strip test: 200
They said we needed to drain the pool, but should we do partial or the whole thing and start from scratch? What do I need to know/do while doing the draining process?
We have a 35-40k gallon plaster pool.