Hi every one. Have owned my current 40,000 gallon in-ground plaster pool for over thirty five years. Pool is surrounded by cement. About four weeks ago pool began getting green and clouding. Initially pool store (via testing pool water) reported that I had too much phosphates Ok so I added some phosfree but that did not help. Last week I was told told I had too much chlorine so could not perform test.
Last Friday I was told the chemicals were balanced and they did not know why I was still having a green problem. Just tested pool (with home testing kit) about one hour ago. Pool is still green and cloudy, chlorine level is fine. Home test show pool may have a little too much alkalinity (it took three drops of solution three to get a clear color) but do not want to add any more chemicals without outside advice. Any suggestions?