Lauralou,
Welcome to the forum.
You do not need a special kit for the SWCG. The one you have perfectly Ok. You will need to get a FAS/DPD kit as extra to get readings above 5 ppm. Eventually you may want to get Ben's PS234 kit which covers everything you need to test your water. It's available from the poolsolutions.com section of the forum.
What may be happening is that the SWCG is generating chlorine at a higher rate than what you normally keep before the SWCG conversion. If this is so, just lower the Swimpure output slowly over a few days to see if the chlorine ppm comes back into readable figures.
Have the water tested at a pool store for comparison while lowering the output. Your figures are good, although the CYA might be a tad high, but do not drain any water on that account. When you backwash, it will drop down.
Hope this helps, and enjoy your freedom from lugging bleach bottles. The only thing you will need is muriatic acid as it is now part of the SWCG process.
Pat
(Supermods, please move this thread to the Chlorinators and SWC generator forum)
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