Welcome to our forum.
Peachy,Are you using some form of pH balancing chem?
I suggest you get your water tested by a professional. Â Typically if calcium is coming out of solution, it is from high pH.We sell Freshwater Stain and Scale Defense. Â Add 2 oz. per 500 gallons at start up and weekly. Â I'm sure it wouldn't hurt to use your metal product weekly.I would be concerned that if you had a calcium build up on the heater you might also have a build up in the circ pump.
My dealer recomends using Defender  every other week to help prevent calcium build up. GeorgiaPeach, do you use Defender or a similliar product?
My fuzzy memory tells me that pH perfect and other such products pull calcium out of solution and they are not recomended for spas with circ pumps. Â Have your dealer check with Hot Spring. Â If you cannot get an answer let me know and I can follow up. Yes, I am suggesting get a sample of your spa water tested by a pool/spa pro.
Hey Chas,When I do a drain/refill, I put a bottle of perfect PH, Any suggestions would be greatly appreciated! Peachy