Unfortunately I was at WalMart already today... but after reading this I certainly hope to make another trip this evening!

It was filled about 3 weeks ago
Filled from a well

CHEMICALS:
Added a 5lb container of pH Minus: sodium bisulfate (93.3%) sodium sulfate (6.7%) - alkalinity still 240+
Added a gallon of muriatic acid - brought the alkalinity down to 180
Added most of another 5lb container of pH Minus listed above - next to no effect on alkalinity
Added pH plus sodium carbonate (100%) (3-4ish lbs based on what's left) after reading alkalinity wouldn't move if pH was low - I was 6.4 or less
Finished off the 5lb container of Minus since pH had come up and alkalinity was still high

Don't know the hp of the pump - it says Krystal Clear 635T 110-120V, 60Hz, 2.1A
Will have to get back to you on the filter

My pH is in swimmable range, but I haven't added any chlorine since I read it would affect how the other chemicals work. My poor kids are just crying to get in there

Thanks for all the help and I'll repost better #'s when I have them.