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We have had a small (~800L) spa for around a month. Ive begun using the dichlor-then-bleach method today after half-draining the spa to reduce the CYA to close to recommended levels. Questions: 1) How often? The providers said drain every 3 months, but apparently that's too long for a small spa. The Taylor site recommends the formula: Size in Litres / (10 x # of bathers daily) which comes to just 40 days for us. I think we should be able to go longer than that, because we wash with soap first and we are pretty small people. What guidelines do other follow? I'm thinking 2 months. Is there a more scientific way to say when to drain (provided of course the water looks fine and sanitised correctly each day)? Perhaps a total dissolved solids measurement? 2) Draining onto garden? Im using the recommended 50 ppm borates, and I understand that a little is good for plants, but that is going to be a lot of borates over time in the soil. What do others do with the drained water?
Hi I have a "paddling" pool, 8 foot diameter, about 3 foot deep. I filled it 2 weeks ago and the water's not looking great now. It's still reasonably clear but there are a few tiny bugs in it (larvae of some sort??). I'm a bit reluctant to drain it all and start again, so is there anything I can use to treat the water at this late stage? I'd like something which isn't going to damage the garden when I drain it. Any suggestions?? Thanks