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Here's my latest "Where did my mysterious salt come from conspiracy theory backyard chemistry" idea - provided by a helpful person on another (non-pool related) forum: HCl (hydrochloric acid) + NaHCO3 (Buffer) = NaCl (salt) + CO2 + H2O Don't get me wrong I didn't actually add any sodium...

Thanks. I really like your dilution idea. I never would of thought of it. Will do it as soon as the kit arrives.

The acid strength is 380g/l. Prior to adding acid: pH 8.2 from store test and about 8.4 on home test kit (not a fancy one). Currently sitting at about 7.4 - test strips. TA 234ppm store test and about 250 ppm home test kit. Currently about 120. Sorry. The 18kl is a typo. :sleep: My estimate...

Thanks. I was actually looking at their test kits online last night. Thanks for the recommendation. I was a little put off when i realised that iffff my last salt reading from the pool shop was even slightly close to correct it will take me about 60 drops of titrating reagent.

Thanks

Thanks for the response. Regarding salinity vs TDS, unfortunately, I can't seem to find the printout to check if there was anything definitive on there but at least now I know what to look for. I googled salinity vs TDS. I do get that the idea is that "salt" should only increase if its added...

Hi everybody, Firstly, apologies if this is better suited to a different forum it just seems a little out of the ordinary so thought I'd try the pool chemistry wizard types. I recently bought a house with a pool and moved in 5 weeks ago. As far as i know it is an old school chlorine pool. It is...