If you think the pool water is clean and healthful, just because it seems clear, think again. Yes, she was shocked by the water, added algaecide and maintained good chlorine, brominated biguanide (Soft Swim or Baquacil), but only controlled the 1% bacteria in the pool! Yes, only 1%. Where is the other 99%? Any pool you can see or see. And most of these places are virtually impossible. The more we deal with swimming pools and the problems of the pool, the more we know we deal with or treat the symptoms, not the cloud-based water, the algae, the scale, etc. – in other articles, I note that cloudy water due to poor water chemistry, poor circulation and environmental impacts due to incorrectly purified water causes many causes. Generally, these reasons focus on creating a problem.
When examining the root cause we see more and more realistic "problems" that are often unnoticed. What do we mean? Have you noticed that the film is filming on the pool liner up and down on the walls or in the corners? If you are a regular grinder, then the problem may not be noticeable. What if you disassemble the filter for normal maintenance or cleaning and see a whitish film inside the container or on the skimmer pits or skimmer body?
All of these films or slimes are so-called biofilms. In the biofilms, the other approx. 99% of live bacteria. 1% of water is called "planktonic". Like plankton or algae, plankton bacteria swim freely in the water. This is the bacteria that can be "easily" killed by chlorine, bromine or other disinfectants. 99% of the biofilm can be quite another story and long-term headaches. There is a lot of information about biofilms around the world to back up my information. One of the most important sources of biofilm technology center at Montana State University
Biofilms in swimming pools often and often have confused water, algae flowers, water heating (preventing efficient heating) and even corrosion (some biofilms have a pH of about 1.0 – very acidic ) on any metal surface of the pool system, including radiators, filter elements, ladders, rails, etc.
First of all, what is biofilm? The biofilm is a film or large quantity of bacteria that is living in the microscopic world and is a huge colony. In the "big" world we could call a coral reef as "biofilm". Biofilm is self-sustaining and difficult to remove. What's worse, the biofilm likes almost any surface, especially wet or damp. But be careful, even after drying, the biofilm is not necessarily dead but simply sleeping. Did we mention that biofilms are relatively resistant to chlorine, bromine or other disinfectants?
Second, how do biofilms evolve? As mentioned above, biofilms are formed on any surface. In the basin, this means that the lining or the basement walls, the bottom, the ladder rails, the skimmers, the ladders, the filter tanks, the pumps and impellers, the directed return (eyeballs), the water pipe of the heating and especially the pipeline . Biofilm development has a five-step process: Attachment, Colonization, Protection, Growth, and finally what I call Distribution.
Attachment is only this; the bacteria cling to the surface. You want to call home and grow. Bacteria want to be in relationships to find a nice surface to settle down and join some of their closest friends. After joining their friends to the surface of the pool, the settlement takes place as bacteria grow in numbers. According to studies, this important point is that this affection is "irreversible." The bacterium battery must stay there unless it is deliberately removed. This phase is usually performed in minutes or hours.
At the defense stage, the bacterial strain or biofilm begins to protect itself against the invasion. Environmental factors, "deadly" chemicals (eg chlorine or bromine), predators, all that they want to destroy. From a technical point of view, bacteria begin to isolate a "exopolysaccharide" film-coated coating. The film is sticky or slim and very tough. The biofilm is ready for explosive growth.
Like the coral reef, the biofilm is getting bigger and tougher. The super colonies of the biofilm really absorb the chemicals that destroy them. Chlorine or bromine can destroy the colony that is more prone to chlorine or bromine, but as chlorine or bromine is depleted, the lower, stronger, better protected layers are still alive and proliferating. The good news is that as the biofilm colony grows in size, it's getting "difficult" and it starts to fall apart. This is the bad news.
We now reach a full circle and reach the Distribution where these broken portions are related to other surfaces or different surfaces. And the cycle begins again.
By the way, biofilms can be found everywhere. Pools, spas, bathrooms, kitchens, functional appearance on the terrace furniture, the teeth (the plaque is a biofilm) where the surface may be damp. You can watch a video on the biofilms in the pool by clicking the link below:
Keep in mind that all biofilms are not bad. How? Some are used in industrial situations for inserting microdisks. But we do not want them in pools and baths.