I don't know what's going on with my spa. 3 weeks ago I drained and refilled my spa with fresh water. Added CYA (too much, but should not cause a problem @ 80ppm) and have only been adding bleach to my 500Gal spa to chlorinate.
All seemed ok for a couple weeks I guess. But now when the jets go high speed and aerate, the foam build up is pretty high. More than I think is normal. It does not last long, nor does it seem smelly, but it's very present.
Now, before you say it's conditioner or soap from suits, let me say I'm pretty much 80% of the bather load. I use the same pair of shorts that have not been laundered repeatedly. (very little if any soap residue there) and I don't use hair product or lotions or conditioners, etc. Anything I introduce to the pool, my 4ppm chlorine level should be able to oxidize.
I added calcium at fill to get to 190 Hardness, 80 alcalinity, great Ph.
I use a 6% bleach from the store, but it is store brand. Is this maybe because I'm not using clorox? Maybe some addiditives in bleach cause foaming that are not present in dichlor?