Okay, so those are your latest test numbers. I suspect you know this already since you've taken some action, but just to reiterate:
- It's critical you keep the FC up. I'm sure FC was eliminated quickly with no CYA before, so that added liquid stabilizer should help real quick.
- Double-check your CYA later today or tomorrow since you added liquid stabilizer. It should record quickly on tests. Then add bleach to match your new CYA as noted on the
Pool School - Chlorine / CYA Chart.
- Keep a close eye on that pH and try not to ever let is creep over 7.8.
- Your high TA may also be pulling the pH up with it, so when you continually add acid, it should slowly bring TA down as well. Let that TA come down to 90, then 80, even 70 if needed. If you continue to have problems, refer to this page:
Pool School - Lower Total Alkalinity.
- Your CH is very low and that could be a problem for your plaster. You should be in the 250-350 range. Calcium hardness can be raised with calcium chloride or calcium chloride dihydrate. They are available in some areas as Peladow, Dowflake, Tetra Flake, or Tetra 94, often sold as a deicer by hardware stores, and some big box stores, in colder climates. Pool stores will carry either calcium chloride or calcium chloride dihydrate under a variety of names, including Hardness Plus, Balance Pak 300, Calcium Hardness Increaser, etc. Calcium products should be spread across the surface of the deep end of the pool.
Hope this info helps. Let us know if you have any more questions.