I wouldn't use the Ultra 6-in one product at all. I also wouldn't use the HTH Select because your CH level is very high and you really don't want it any higher or you risk having issues because of it. I also wouldn't use the cellulose fiber. Stick with only bleach and if needed, Borax or muriatic acid. Nothing else. But, don't add any acid until you confirm your pH reading via dilution.

Keep the chlorine at shock level by using bleach. Glad to hear it is clearing some. Keep at it.