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I came across a public indoor Pool ,which is using CO2 in order to bring down the pH. Sodium Hypochlorite is used as a disinfectant. Now : It seems the TA creeps up by using CO2 and more and more CO2 is used the higher the TA gets. . . Doesn't really make sense to me that CO2 brings up TA - I...

To my knowledge this is the first extensive study which examined indoor pools in the USA . It seems that finally attention is being paid on DBP's in order to protect public health. For good reason the German regulation (DIN 19643) limits the amount of THM's at max. 20 microgram/l. More and more...

I need some opinion / advice from the experts here. . . (chem geek - I hope you are reading this) OK - I went to see a public indoor pool today ( 250.000 gal) in order to take a look at their filtration system. Filters are old, rusty and they are thinking of replacing them. Crystal clear...

:?: ORP readings don't take into account the pH. Naturally the lower pH the higher your ORP will be, but the measurement of the ORP is just that. . a measurement in mV regardless how low/high your pH is and regardless how low/high your FC is. To put it simple ( without using chemical formulas...

Aluminium based flocculants are excellent. IMHO this is essential for proper water treatment,in order to capture colloids. A sand filter is able to filter about 20 microns - colloids are 0.001 - 0.1 microns .The problem with non commercial filters is the filtration speed , which is usually...