I have a one year old Caldera hot tub. We love it and use it often. Due to where we live, we keep it in a garage, by a window and keep the window cracked for ventilation.
Every time I turn the jets up a bit (off low), I get a heavy yellowish foam that leaves a thick cottage cheese ring around it. I use the test strips & chemicals per manufacturers instructions (as well as a local spa store 1 block away), get the water tested, change water every two months, change the filter every time, have the oxygen thingy, and have used a couple of times the fluid that kills every living organism for 8 miles around. Still, the problem is getting collectively worse every month.
The only thing the store people can figure out is that we have some college kids use the spa a couple of times per month and they use all the lotions, hair goop...
Does anyone have any thoughts as well as to what this may be and if there is any way to get a handle on it?
Thanks!