Hello JK! Welcome to TFP. You have the TF-100. Outstanding!
From the looks of your readings, there are a few concerns.
- First issue is your CYA. Anytime your CYA approaches 90-100, it becomes almost unmanageable. Please look at the
Pool School - Chlorine / CYA Chart to make sure you understand that based on your current CYA, that's what your FC should be.
- We would typically recommend to anyone with a CYA that high to consider a partial drain (30-50%) if possible; that's the only way to lower CYA. It's best to adjust CYA FIRST before trying add any more chemicals or address any potential algae.
- Once CYA was lower, we would ask you to raise FC using regular liquid bleach; raise to match your new CYA based on the CYA chart above
- Make sure PH remains between 7.2-7.8 using muriatic acid.
- Yes, your CH is quite high, probably from your local water source.
Here are a few more links that we use at TFP all the time:
Poolmath calculator
Pool School - Recommended Levels
Pool School - Recommended Pool Chemicals
If you have any more questions, just let us know. As my esposa would always say, bienvenidos!