This site has been a serious help. Pool turned green, pool guy said sorry, good luck. Having nothing but a cheesy HD test kit I immediately ordered a K-2006. I started the addition of liquid chlorine, 24 hour pump time, twice a day brushing and once a day vacuum. It started looking good slowly. Got the test kit yesterday, CYA at well over 100 answered many questions. Drained 1/3 and refilled.
5 days into it and it looks much better. Grateful to have found this site.
In Hawaii it's pool time 365. No room for green pools.