Hot tub has a leak, stop leak won't fix it so time to remove the skirt
and start the hunt. Loaded the tub with 4 bottles of food grade dye
after topping up the water, pulled the filter and let it run.

Opened the lid two days later, the water is crystal clear and only
dropped slightly.

I believe the leak is in the filter area but can't figure out where the
dye disappeared to? I have not removed the skirt yet to see if it's
stained blue anywhere.

So where did the dye go?????