TomMettam Posted October 27, 2016 Report Share Posted October 27, 2016 Hi all We have a large Hydropool swim spa, roughly 6,000 litres. After a refill, it takes more than 1kg of PH- to bring the alkalinity down to a proper level.. this seems like a lot! Is this normal? Does anyone else have such issues? Quote Link to comment Share on other sites More sharing options...
Poolee Posted July 28, 2017 Report Share Posted July 28, 2017 Try to read on this: http://www.havuz.org/pool_pool/pool_maintenance/water_testing/total_alkalinity.htm Quote Link to comment Share on other sites More sharing options...
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