white mold in hot tub

[wishIcould]

We hadn't used our salt water hot tub by hot springs hot tub for over 2 months. Water had been replaced last time and balanced. Just went to use it and I had white mold in my hot tub. I shocked it with swcg did nothing, I dumped all the water, scrubbed it down, sprayed every crack with bleach. Refilled it and of course it came back the minute jets came on as it must have been stuck in the pipes. I just put a gallon of bleach in, and let it run 20 hours and don't see any of the crap floating around any more. I openned and closed all valves while running the water. The chlorine levels are off the charts.... my bad.

Reading other forums said to use spa system flush, replace filters, shock, etc. Do I need to buy spa system flush or is their a cheaper alternative, or can I just cut my chlorine levels by adding peroxide back to normal and get all the rest in balance since I don't see much of the crap any more? do I have to replace my filters?

I don't want this crap coming back. I've owned a spa for 8 years and never had this. I think possibly my door to my filter isn't dropping and water isn't circulating when spa isn't in use. Not sure but once I get it in check I will be diligent about keeping water balanced and seeing if anything else is wrong.

My filters are 4 years old. uses salt system normally. has always been easy till now.

Thanks for the help on what to do next.

Update..... I was wrong there are still small skin like white things in there. Just a small amount. What next?