Available chlorine vs sodium hypochlorite

[silver02gt]

So my normal supplier of pool shock switched brands and instead of 10% sodium hypochlorite on the old brand, the new brand says 15% available chlorine and 12.5% sodium hypochlorite. My guess is I need to calculate using sodium hypochlorite, but I wanted to ask to be double sure.

On the bright side, the price I still the same, 4 gallons for $9.99!

Thanks as always for your help!

 

[Richard320]

Pool Calculator will let you plug in 12.5%. It also has that as one of the choices on the drop down menu.

 

[chem geek]

As Richard says, put in 12.5% into The Pool Calculator, but their 15% Available Chlorine can't be right. The following relationship is usually true:

% Available Chlorine (weight % of chlorine) < weight % of sodium hypochlorite < Trade % of chlorine (volume % of chlorine)

 

[DCAG]

And $10 for four gallons of 12.5% is excellent

good for you!

Dan

 

[Speedo]

Menards has that same price right now, too bad it isn't the regular price! I pay $13 for 4gal of 10% which was only $11 last year.