It's totally a filtration issue, what, without knowing precise numbers for lack of the FAS-DPD test.
Without that kit, technically you should be keeping it at shock levels till the water is clear, but honestly that gets pretty stupid expensive with an Intex filter, as I have seek it take a week to clear a cloudy pool.
These Intex filters are notoriously AWFUL! I know 1st hand. :/ Had to put up with non-crystal clear water as my niece lived in the pool this last month, as there was no time for the filter to catch up all the way each day between swims.
I feel for you!
Go track down, locally, a small bag of cellulose d.e. alternative filtration powder, and add it to your cartridge filter as I detailed in my previous post. This will dramatically speed things up.
Sent from my PC36100 using Tapatalk 2