Converting to Cl from Soft Swim, Peroxide at level 7

[jeffmarc]

I have 24' above ground pool. Last year I closed it up and did not add any new Soft Swim (Baq) Chemical. I had some green algae on the bottom of the pool.

I opened and the green algae was brown, I vacuumed almost all out to waste.

Had water tested and have a level of 7 of the Peroxide or Soft Swim B.

My question is , How low does this have to be before I start converting?
I don't want green water for a month, I need to get it up and running in a a couple weeks.

Also , I have a bag of Calcium Hypo chloride, can I use this to raise the chlorine levels initially?

I see others talking about reading about how to convert but can't find links.
If there is somewhere to read about this please provide link.

Thanks for any help!

Jeff in GA