FIRST TIMERS: Ok we have an 18ftx48 ft intex pool. We r using salt. We noticed after 2nd day it was a slightly tingy green. Added shock chemicals. Still green today, so we cleaned it, scrubbed it and after we cleaned it the chlorine level was no longer high but in ok range. SO we added more shock. We have noticed that filters were turning a brown and we put a sock over the return and that to turns brown. We do not have the tester u all talk about We have gotten afternoon storms both days, which im sure is not helping. What else do u suggest we do, we want our pool back to being swimable! TIA