Check the inflation valves
Half hour.it must be a real slow leak if the soap bubble test didn't show it up, how long is it taking to effect the fishing?
You're kidding, right?Are you taking the bladder out of the boat fabric and performing your leak check? That might help find the leak.
I wasn't kidding, just asking. Sounds like you're already a step ahead of me, so you can forget my suggestion.Half hour.
You're kidding, right?
Took bladders out, rinsed off any sand/debris, lightly coated with liquid soap to try and locate bubbling or hissing.