I'd get 4 boxes of borax and 12 gallons of bleach. Add no more than 1 gallon of bleach tonight -- since I don't know if your well water has metal (iron?) in it. Do NOT raise your pH yet. Do run your filter 24/7. Do test your water once the pool is full.

Also, if you can get it, add some polyquat (see this page: www.poolsolutions.com/gd/polyquat.html ) but do NOT buy the HTH brand. HTH and Walmart have gone over to the dark side. Walmart's pool chemicals are awful, and HTH has kept the brand name but changed the contents to to 'goop'. You'll probably need to go to a pool store, and you MUST use the chemical name to check what you are buying.

The problem is, you need high chlorine to kill algae, and you need low chlorine to keep metals in your pool water from staining your pool!