Nitro Posted July 24, 2009 Report Share Posted July 24, 2009 There has been some discussion about Biguanide (Soft Soak, Baquacil etc) lately, so I thought I'd post some important info. Anyone considering this method of sanitation needs to read this. Here is a post by Waterbear (the expert on the subject) from this thread. Biguanide works by causing bacterial cells to 'explode'. The 'baquagoo' is actually the remains of the cell wall and other stuff. Biguanide is not an oxidizer so these bacterial remains do not get 'burned off' like they do with chlorine and bromine. The peroxide oxidier that is used with biguanide does help burn them off to an extent but it is not as strong an oxidizing agent at the concentrations used. Higher concentrations are out of the question because they would cause bather discomfort, to say the least! This goo gets collected in the filter where it is, hopefully, removed by frequent filter cleaning (MUCH more fequent than is needed with either chlorine or bromine.) This is just the nature of the beast, so to speak, when using a biguanide system. Also, since it is basically a biocide like the antibiotics our doctor's prescribe it has been found that bacteria do develop an immunity to it over time much like they can do with antibiotics, which is why both pink slime and white water mold, which are both bacterial, are a problem with biguanide system. Biguanide is also used as a medical preservative and there has been a case in recent years where it was used in a popular contact lens solution that let to the outbreak of a corneal amoeba infection that led to blindness in several cases. There was a large recall of this well known contact lens solution just a few years back because of this. Once again this seems to be more evidence of it's limited effectiveness as a biocide. Also, it is not registered for use in Canada. What do they know that we don't? Add to this the known fact that biguanide will destroy certain plastics that have been used in spas and are suspected of affecting pump seals makes this, IMHO, a sanitizer of last resort for those who CANNOT use either chlorine or bromine (rare but it does happen!) Quote Link to comment Share on other sites More sharing options...
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