Andrea,
If you want to try and add borates, I would shoot for 40 ppm. In that case, you will need 10 boxes of 20 mule team borax (green box sold at Target, Wal-mart, most supermarkets in the laundry section). You will also need about three gallons of muriatic acid.
Put your intelliflow on speed 4 (high speed). Add 1 gal. MA. Then maybe 15 min later add half of the borax (5 boxes slowly into skimmer). I would do a round of brushing between each chemical.
Wait about 2 hours and check your pH and adjust accordingly. You'll proably need to add some MA.
Then I would wait a day or two and repeat, adding the last five boxes of borax and finally get your pH in check.
I just did this myself and I ordered some borate test strips from
http://www.lambertshomeservices.com/ for $10 for 25 tests.
Hope this helps and good luck! Ask questions as needed

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