I've seen this yellow gunk around the water line before, usually shows up when the jets are running then seems to disapear. I've only had the hot tub for about 6 months, I add bromine and shock once a week.
Last night I decided to completely empty the hot tub so I added half the bottle of Sea Klear System Flush, let the jets run for about 30 minutes, emptied the hot tub and scrubbed down the shell. Rinsed inside with the hose, emptied out what I could again using a pump. Then I added fresh water, turned the hot tub back on, started the jets and saw all this junk again.
Anyone know what this is? Since I already emptied and started with fresh water, how am I supposed to get rid of this? Thank you...