Why Your Hot Tub Won’t Hold a Sanitizer Reading

Adding sanitizer to your hot tub but the reading drops to zero within hours? This is one of the most common – and most frustrating – hot tub problems. The cause is almost always one of a handful of things: high demand from organic contamination, biofilm in your plumbing, pH out of range, or a stabilizer problem. Here’s how to figure out which one you’re dealing with.

Hot Tub Biofilm: What That Slime in Your Lines Actually Is

That slimy gunk coming out of your hot tub jets is biofilm – a bacterial colony living inside your plumbing. It survives regular sanitizer doses and won’t go away on its own. This guide explains what biofilm is, how to flush it out completely, and how to keep it from building back up.

Hot Tub Slime in Plumbing Lines: How to Clean It Out

That slimy, sometimes smelly gunk coming out of your hot tub jets is biofilm, a bacterial colony living inside your plumbing lines. It won’t clear up on its own, but a proper line purge before your next drain and refill will get rid of it. Here’s exactly how to do it.