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<< How are levels of bacteria tested on recreational boats? What happens if the device begins to fail slowly and the owner does not realize that there is a problem?
Bacteria levels aren't tested on recreational boats - the degree of chlorine produced, which is in direct proportion to the amount of bacteria neutralized, is the test. That is indicated, again, by warning indicator lights when it falls below a normal level, and outright shutdown when it falls below an acceptable level. The unit tells the owner when it becomes less effective, through warning lights.
