Sounds about right. I don't know if you can turn off the SWCG but I would try.

The Super Simple Recipie http://pool9.net/ssr/ should be a pretty good startup plan. Follow the "Intex Pool Care Plan" using dichlor until you have sufficient CYA in the pool then you can let the SWCG take over; it won't be able to keep up with the demand in an unstabilized pool. According to the pool calculator, 4lbs of dichlor (3/4 Cup at a time) will get CYA to 55 which should be good.

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