Do you know if your well has iron or other metals in it?
If it does, and you add chlorine, the iron will likely will immediately drop out and make a big mess.
If you are SURE it does not have iron, begin adding 1/2 gallon of bleach nightly. Vacuum and remove all debris (there may not be any -- if not, skip this.) Backwash or clean your filter and restart it. Set your pump to run 24/7.
THEN . . . add stabilizer to the skimmer, at the rate of 3 lbs per 10,000 gallons of pool water. Add it slowly, so you do not choke the skimmer. Continue to add bleach at the rate of 1/2 gallon each EVENING. Let your pump run for 5 days, without backwashing.
Meanwhile, tell us your
+ pump & filter make/model
+ heater, SWCG, cleaner if any.
+ how you are planning to test.
BUT . . . if you do have iron, see if you can find some polyquat (http://pool9.net/polyquat/) locally. Follow the label, and add an 'algae dose' followed by maintenance doses. Add chlorine at the rate 2 cups via the skimmer at night.
AND tell us what you know about your metal situation.
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