I bought a fresh water salt and i added 2 table spoons and 3 hours later I come home to a slightly cloudy tank. I dont know whats going on. I bought the master test kit aswell every thing but high ph is good its 7.8 I thnk. And low ph is kinda iffy like 7.2 I dont know if i am retarted but correct me obn what the levels are good at. sorry