You have high chlorine levels and your water in your pool is still brownish green why?

This is water CHEMISTRY, so there could be multiple reasons. For starters, it could be iron or copper present in the water, unfiltered particulates, or a reaction between the high chlorine and said metals. The first step is to balance your water: get the pH, alkalinity and calcium hardness to correct levels (7.4; 100 ppm; 240 ppm, respectively) - in that order. Allow the chlorine to drop to a normal level (2.0 to 5.0 ppm). Run your filter 24/7 until it's clear (even after it's clear!). If that alone doesn't clear it, add a liquid "metal removing agent" to "chelate" the metals.