cloudy water

You should also consider testing your CYA with 1/2 pool water and 1/2 tap water then double the result for a more accurate reading.
You may benefit from a partial drain and refill due to a high CYA. Check this out......
 
You've been adding borax as instructed by who? PoolMath? But if you have cloudy water, that sounds like an algae issue. If your CYA is 90, your SLAM level is 35 which is kinda insane. Definitely consider bringing that down before you attempt the SLAM.
 
Thread Status
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.