I use the DPD powder to obtain my chlorine, but sometimes my wife likes to be more involved and check the chemicals, so she uses Ben's PS-200 kit. We need refills for that kit and see the R-0014 listed, but do not see the number for the OTO (looks like R-0600).

I am about to place an order on SPS Pools and Spas but do not know what number the OTO is.

Thanks.