Thanks for all the info. Would it be best to drain off some water to lower the CYA to 30-60 as per the pool builder instructions. Their initial instructions state that "adjustment to alkalinity or partial drainage of pool may be required should stabilizer exceed 60." Tonight's test results: CYA 125, FC 5.0, CC .04, PH 7.4, TA 150, CH 450 with a saturation index of .40. If it matters, the pool is 18 yrs old and it is time to redo the marcite. A friend of mine who has maintained pools for decades at his motels, said he paints them instead of re-plaster. Any thoughts on this.

Thanks again for your help.