Unfortunately, jblizzle , the water is not well balanced.
FC=3
TC=5
Salt=3500
CH=400
CYA= 50
TA= 100
pH= 7.8
There is some “scaling” at the bottom of spa, I would like to manually scrub it to feel how hard it is, I am brushing with Nylon and Steel daily , It may help a little bit but could take...