What is growing in my hot tub?

Bought a home with a built in outdoor hot tub. I did not use it for quite some time and have been taking the water in to be tested every few days for the past month or so. Water keeps testing for high metals and the store has been giving me various chemicals to draw out the metals. The issues with water hardness, PH and alkalinity have all been fixed but still working on the metals issue. Now I go to treat it again and there is stuff growing in there, as well as even some kind of worm creature. Don’t even know how this is possible given the bromine that goes in there every week. The store will send someone from service next week but can’t get anyone sooner due to the holidays.

Wondering if anyone can help me identify what the heck is growing in there because I sent photos to the store and they couldn’t figure it out either. It is so gross.

White gelatinous stuff growing by what I think it the filter?

White gelatinous stuff growing on stairs

The creature living in there

More gross white stuff

 

My first step would be to simply drain and refill the spa with clean water. You've got a real mess on your hands and I wouldn't waste time and money on chemicals trying to bring back water that's obviously got a lot wrong with it. It's usually quicker, cheaper and easier than trying to remove significant amounts of metals and organics that are already in the water. Then with clean water you can start with normal sanitation practices.

 

Its normal to do a water change several time per year, after awhile the balance gets so messed up you simply cant fix. Drain it, clean it, get a water tester and start fresh!