How do I clean biofilm from a spa?

[Freddie]

I think my spa might have biofilm buildup because the water feels slimy and cloudy no matter how much I sanitize it. I’ve cleaned the filter and shocked the water, but it always comes back after a few days. What’s the best way to get rid of biofilm completely?

 

[Zephyr]

I think my spa might have biofilm buildup because the water feels slimy and cloudy no matter how much I sanitize it. I’ve cleaned the filter and shocked the water, but it always comes back after a few days. What’s the best way to get rid of biofilm completely?

That definitely sounds like biofilm. It hides in the plumbing lines where sanitizer can’t reach. Use a line flush product like AquaDoc Spa Purge before draining. Let it circulate for a few hours with jets on then drain and refill. You’ll see a lot of gunk come out the first time, but it works great.

 

[Manikshaw]

I think my spa might have biofilm buildup because the water feels slimy and cloudy no matter how much I sanitize it. I’ve cleaned the filter and shocked the water, but it always comes back after a few days. What’s the best way to get rid of biofilm completely?

I had the same issue. Shocking the water alone doesn’t help much because the film sticks inside the pipes. Run a pipe cleaner through your system every 3-4 months. After that, replace or clean your filters and start fresh with balanced water.

 

[syedsam]

I think my spa might have biofilm buildup because the water feels slimy and cloudy no matter how much I sanitize it. I’ve cleaned the filter and shocked the water, but it always comes back after a few days. What’s the best way to get rid of biofilm completely?

Make sure your water is hot when you use the purge. The heat helps loosen up the buildup. I run mine for a couple of hours at 100°F, then drain and rinse well. Since I started doing that, my spa stays clean way longer.

 

[Freddie]

Thanks for the advice! I’ll grab the AquaDoc Spa Purge and run it hot before draining. Sounds like that should finally get rid of the slimy buildup for good.

 

[Wei Cai]

I’ve dealt with stubborn biofilm too. What really helped was running a purge while the water was hot, letting the jets run for a few hours, then draining and rinsing. Since doing that, my spa water’s been way more stable.