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it's a FW but I didn't notice if it was a II or a III :-/
Was it a big black box or a small black box?
Still bubbles....still gurgling........
MLG,I don't think you have anything to worry about, but the sudden appearance of bubbles that weren't there before is curious.My 93 Prodigy bubbled and gurgled the entire 12 years I had it. That was with a working ozonator and after I had removed it from the tub when it stopped working. I kinda liked it and considered it my "water feature". (My new Envoy bubbles, but doesn't gurgle)Get it checked out just to know if you have an ozonator, and if it is working, but in my own (uninformed) opinion, I don't think you have a problem that could damage the tub in the immediate future.
Richs100, I looked and I DO have an ozonator.....apparently an aftermarket install as the 2005 didnt come with them. (I bought this tub from a private party) It just started all on it's own a couple of days ago. It concerned me at first because at the time I didn't even know there was one...and it was gurgling, where before it was perfectly silent....which was VERY nice. So I'm not really "concerned" anymore...just miss my silence when I sit with the jets off. No biggie tho!