Go to http://nspi.org/ConsumerResources/Find+APSP+Members.htm
Search there to find professionals. It is the site of our professional trade organization.
The difference between pool and spa MPS, is the spa product is buffered. The pool product will drive your pH down. As long as you test and adjust, you should be fine.
Prior to each use add 1 tablespoon MPS per 250 gallons.
Weekly add 3 tablesppons per 250 gallons.
Sorry for the negativity. I was not bashing, simply relating stories that were told to me personally by Master Spa salespeople. Perhaps in other parts of the country they are more professional. Glad to hear that the stories were dealer stories, not manufacturer stories.
As you know, it has a shorter warranty, no color selections, different skirt, no ozone as a standard, no stainless steel no Hot Spring name on it. It may not be Hot Spring lite, but it is not a Hot Spring.
Interesting story. In most markets the way you describe the dealers is just the opposite.
Just curious, did the Master dealer tell you their discretited Microban story? Did they tell you their NSF drinking water story? Did they tell you their undocumented cost of operation claims? Did they tell you their magnet story?
What else did the Hot Spring people tell you that was false? The weak shell claim because of 70 holes is pretty silly, I agree. But to claim the master blaster is several jets is silly also. If the Master Blaster is several jets, so is the soothing seven.
The wet test is important. Which Hot Spring are you looking at? You should be looking at the Vanguard and Tiger River Caspian.