You could do it in less then a half day. I've done this many times and it works great.
Lay it on a side and then put a mixture of 10 parts water to 1 part mueratic acid on that side (should take about a gallon or 2) Let that sit for an hour then flip and repeat. Just wear gloves and makes sure your kids or dog doesn't lick it up or anything like that and you'll be fine. I always do it in my yard so you can hose it off in between sides and wipe off the scum that's left.
Lay it on a side and then put a mixture of 10 parts water to 1 part mueratic acid on that side (should take about a gallon or 2) Let that sit for an hour then flip and repeat. Just wear gloves and makes sure your kids or dog doesn't lick it up or anything like that and you'll be fine. I always do it in my yard so you can hose it off in between sides and wipe off the scum that's left.