After filling with well water the water turned brown. then after 4 days of messing with it adding hth metal control it got kinda clear, but was kinda green so i assumed algae. then this morning i added hth shock and swim. after i got home it was brown again. what to do next? which one do i fight first? i've read that adding too much chlorine by shocking will cause it to turn brown again, but how do i know i've gotten rid of the algae if its brown?