Ankit Posted August 7, 2021 Report Share Posted August 7, 2021 I recently moved into a house where the previous owner used biguanide in the spa. We are having a coughing issue with fumes when the spa jets are on (surprisingly we don’t have the goo issue people talking about). I didn’t have the fume/coughing issue with bromine in my previous spa ownership experience. How do I go about switching to bromine correctly? I read that I should use ahh-some and drain the spa but do I just do this one time or do I have to repeat the process several times? I recently got new filters but used them with biguanide, so can I just clean them and reuse with bromine or do I need new filters again? Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted August 8, 2021 Report Share Posted August 8, 2021 Float the filters in the spa with the ahhsome. It may take several uses to remove the buildup, but once done it's done, and a single use at water change will be sufficient thereafter. I have used it multiple times with the same water, just be sure to wipe off the gunk before it dries or you'll be sorry. Quote Link to comment Share on other sites More sharing options...
waterbear Posted September 1, 2021 Report Share Posted September 1, 2021 On 8/7/2021 at 6:19 PM, Ankit said: do I need new filters agai You will most likely need new filters because one a halogen hits the biguinide residue it will form goo. When you refill you will have to oxidize any remaining biguinide in the plumbing. I suggest chlorine. If there is biguinide present the FC won't hold. Keep adding chlorine (I suggest bleach) until you can hold a free chlorine level of 10 ppm. Then drain, purge, and refill with new filters and start your bromine. Quote Link to comment Share on other sites More sharing options...
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