Step from above:
"2. Go to Lowes (HomeDepot, possibly a big AG supply) and get 4 gallons of PLAIN (not safe, not diluted, not non-fuming) 31.45% muriatic acid. Get some nitrile rubber gloves and safety glasses, if you don't already have some. READ the muriatic acid page in my signature, and then begin adding acid, 1/2 gallon at a time, till your pH is near 7.0. Keep it there till your alkalinity is below 100 ppm."

question: I need to to have ph near 7.0 and alkalinity below 100ppm before doing anything else (except adding bleach daily and removing Nature2)? I think that may take awhile!