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Does clear water equal low/no bacteria?? There are testing methods for chems., but, is there a cost effective (low cost) way to actually check for bacteria levels??
QuoteDoes clear water equal low/no bacteria?? There are testing methods for chems., but, is there a cost effective (low cost) way to actually check for bacteria levels??No. Clear water does not equal low/no bacteria. If you are using chlorine, the safest way to assure you are bacteria few (not bacteria free), is to make sure you get the free chlorine level to 3-5ppm when you are done using the spa. Also get it to that level if you do not use the spa for more than 4 days. This will knock the bacteria down to a level that is not harmful.
I use the amount of residual chlorine 8 and 24 hours after a dose as an indicator for active bacteria in the tub. If a 3-5 ppm dose still has over 1ppm after 8 hours, and any measurable amount after 24, I feel confident that the chlorine is staying ahead of the bacteria. Now there could be some chlorine resistant strain in there... but with otherwise clear, no-odor water, I'm not concerned.On the other hand, if all the chlorine is gone after 2 hours...
QuoteI use the amount of residual chlorine 8 and 24 hours after a dose as an indicator for active bacteria in the tub. If a 3-5 ppm dose still has over 1ppm after 8 hours, and any measurable amount after 24, I feel confident that the chlorine is staying ahead of the bacteria. Now there could be some chlorine resistant strain in there... but with otherwise clear, no-odor water, I'm not concerned.On the other hand, if all the chlorine is gone after 2 hours...A good sanitizing routine will keep your water safe and bug free. The question specifically was does clear water mean bacteria free water. You can have unsafe water that is clear. You can have cloudy water that is safe. Cloudy water is certainly an indicator of a problem as clear water is an indicator of being maintained. To unequivically say that clear water is safe water is inaccurate.
To unequivically say that clear water is safe water is inaccurate.
I can remember testing the pool water for the YMCA. It involves taking a sample in a sterile vessel (so not to introduce additional bacteria) with sanitizer inactivator. Then filtering a pre-determined amount of the water through membrane filters and putting the filters on agar plates of media specific for water organisms. Then the plates are incubated at a specified temperature for a specified time (that was 15 years ago so I don't remember all those specifics). At the end of the incubation period, the plates were evaluated for the number of bacteria, in additon to the types of organisms. (you would need a microbiology lab). So I made this into a long story, but this is why they don't have an "As seen on TV" bacterial indicator test kit for at home use! Besides, it could be dangerous to culture bacteria without an effective way to kill it. I know Vinny will love this one!