Biofilms and How to Treat Them

ASK THE POOL AND SPA EXPERT

QUESTION: What are biofilms and how do I treat them?

ANSWER:

A biofilm is a collection of microorganisms living together on a wet surface.  It can be described as a home for bacteria, fungi, algae and protozoa.  In a spa environment, a biofilm at the waterline is the perfect place for bacteria to grow protected from the sanitizer.  The biofilm will grow and spread as the microorganisms reproduce.  To remove it, clean spa surfaces thoroughly each time the spa is drained.  Frequently wipe the waterline (as much as every other day in heavy-use spas) in order to prevent the formation of new biofilms.  Be sure to use a cleaner that is specifically designed for spa use.   Never use household cleaners as damage to the spas surface may occur. 

As with any chemical program, proper maintenance is the key.  Always maintain an appropriate sanitizer residual to kill any new bacteria that may be introduced to the spa.  Shock the water weekly (or more often for heavy-use spas) to keep the water free of contaminants that can cause cloudy water and contribute to the buildup of scum line.  Always maintain proper water balance as the sanitizer will work better in properly balanced water.  Good water balance also helps protect spa surfaces and equipment from corrosion. 

For more information, bring a water sample to PoolCo, your BioGuard® dealer, for testing.  We can help you choose the right cleaning and maintenance products that will get you back to enjoying your spa worry-free.