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Quote"What I haven't seen yet is a recommendation based on TDS (total dissolved solids) which is the REAL gauge for determining when a spa should be drained. A "time frame" offers little help due to the many aspects that alter and increase TDS at differing rates such as volume of water, bather use & frequency, overall water care, filtration, cleanliness of bathers and so on. I've seen some go 8 weeks and others go 8 months while remaining under the 1500 TDS limit for a spa. Remember that TDS of more than 1500 can inhibit the effectiveness of your sanitizer and that in itself is important to know.SteveSteve, isn't it 1500 above your starting point? In other words if your water from the tap starts at 500 TDS then 2000 on the scale is the magic point?
"What I haven't seen yet is a recommendation based on TDS (total dissolved solids) which is the REAL gauge for determining when a spa should be drained. A "time frame" offers little help due to the many aspects that alter and increase TDS at differing rates such as volume of water, bather use & frequency, overall water care, filtration, cleanliness of bathers and so on. I've seen some go 8 weeks and others go 8 months while remaining under the 1500 TDS limit for a spa. Remember that TDS of more than 1500 can inhibit the effectiveness of your sanitizer and that in itself is important to know.Steve
Steve, isn't it 1500 above your starting point? In other words if your water from the tap starts at 500 TDS then 2000 on the scale is the magic point?
Is it safe to assume that if youre NOT having water balancing or clarity problems, and your out over three months, that it is ok just to say "if it aint broke, dont fix it (yet)"? I mean, I wont fight with bad water just to delay changing it, but if I can get away with longer, that would be nice. So far for me, 3-3.5 months has become the point of diminishing returns. I've never measured TDS, though.