pfbmgd

I have been using 35% peroxide for about a year . It was pretty good . I had a few clouding problems over that year .I used a small amount bromine to clear it . But now I had clumps of what looks like slime floating around . I drained the tub completely disinfected it . But I`m having clouding issues . The PH is high I have been trying to lower it for two days . Using a bit of bromine to try to clear the water . I`m changing the filter today and adding the Peroxide . I`m told if PH is high the Peroxide will disappear pretty quickly . Any suggestions at what I`m doing wrong ?