Our resort had a new indoor hot tub built a few months ago and I've been having a couple issues with it.
Ours is the only multi-tier hot tub in the whole state, and now I know why, this thing is a pain! The pH is constantly on the rise due to the aeration of the three waterfalls, not to mention the ridiculously powerful 3HP jet pumps that came with it. When the jets are on, a large mass of soapy smelling foam collects where the jets converge. When the jets are off it dissipates in a couple minutes, but it is annoying and I'd like to eliminate this.
Here's the latest set of test results:
Temp = 102
Bromine = 5.0
pH = 7.8
Alk = 30
CH = 250
While the ph and alk are off from ideal levels, this is almost spot-on on the CSI.
Every morning the pH is 8.0 and we have to add muriatic acid manually, this means the alkalinity is constantly low. Does the pH always being on the high side have anything to do with the foam? I know it's mostly caused by oils, lotions, etc., but is the bromine fighting (and failing) to keep up because of the higher pH? The water isn't cloudy, so it seems like the bromine's doing it's job.
I wanted to install a peristaltic pump to feed muriatic acid continuously, to keep the pH in range, but I don't know if this would help the situation. We've been following the WRI and the foam was gone for a couple days after the refill, then came back just as strong. The bather load wasn't all that high during this period either. I also change the filters every other day (every day at one point) and this seems to have no effect on the foam.
I've heard on here before that some people just have to have a lower alk and higher pH, but both levels are above or below the listed state code (ph max = 7.8, alk min = 80).
What should I be doing, aside from forcing every person to shower before using the hot tub at gunpoint, that is?