Arydant

Thanks for clarifying. I am a consumer and I can say I really had a good experience buying from this place: America's SPA-MART11361 Mosteller Road Cincinnati, OH 45241 I did a fair amount of research at the time and crossed my fingers. Looks like they are still in business. just google it.

I have an older 4 person spa that I run in a 3 season porch. It is used every other day by 2 people. It is drained during the winter. I use bromine tablets in a floater and a ozonator and monitor the chemistry with strips regularly. Most of the time I have to lower the PH. I shock every week. I replace water every 3 months. Recently, we have been seeing dime-sized clumps of pale custard-like material floating in the water. In ten years I have never seen this anything like this before. The water is clear and there is no smell. The custard material is very soft and spongy with no odor. The filter looks normal. I have not inspected the inside of the plumbing. I suspect this might be a mold of some kind but cannot find any specific reference or images on-line that help identify it. Can anyone confirm what it is? Link to image attached. Link may be temporary or not work. https://www.dropbox.com/s/vgiuxihjzkbwy8s/spa%20custard.jpg?dl=0

I live in MN and I have a 4-person spa in a 3 season porch area. I purchased a basic replacement cover a couple of years ago from a place in Ohio that I am very pleased with. Service was great and the price was very competitive. Unfortunately, due to posting rules, it doesn't look like I can post the name of the place. Good luck.