This is one sick puppy!
Current state (K-2006 results)
FC 27 ppm
CC 2.5 ppm
No visible algae, water clear
Areas of stains on floor (ascorbic acid spot test indicates metal based stains).
Long history of Trichlor tablet chlorination (CYA accumulation).
Terminated and switched to liquid chlorine.
Request advice on sequence and timing of corrective measures:
70% water replacement
Verify CYA less than 50
FC => 0?
stain treatment (ascorbic acid)?
sequestration (recommended agent?)
Any suggested methods, caveats and other help would be very much appreciated.
Ready and willing to use BBB methodology moving forward.