Do Squeaky Pufts provide a net increase of bleach stone and chlorine?

According to the answers on the Oxygen not included forum:

If I'm not mistaken, they have the typical 50% conversion rate of food (chlorine gas) to excrement (bleachstone).

It appears the Squeaky Pufts convert half the mass of gas into solid bleach stone and the puft consumes the other half of the mass. I assume that bleach stone converts back into an equal mass of chlorine through evaporation.