My 260 gallon hot tub has been great for the past 2 months. Water clear, chemical levels good. Lately, the temp has been going up to 108 even though I have it set at 80. Dealer is coming out to look at that. Now the water is clouding up. pH is 8.0, TA went from light blue to yellow when I tested it using the Taylor K 2006. Normally it goes from green to red. But the blue/yellow color change happened at 50ppm. CYA is 45ppm, free Chlorine is 18ppm. When I tried measuring CH and added 5 drops of R-0011L, it turned a very faint lavender and then to clear when I swirled it. I added 30 drops of R-0012 but no color change. Please tell me what's going on! Is it due to the high temp?
260 gallons, outdoor spa. Cartridge filter. No ozonator. 2 people use it 45 minutes once a week on average.