Does not matter. Just allow at least 30 minutes between adding the bleach and acid so they are mixed in the water.
cpowderly said:If your numbers are actually right I would think 6-8 oz of MA would be ok. Without a TA number it's hard to know how much to use since that can make a big difference. Another 15 oz of bleach should keep you under 5 FC which is where you need to be for your CYA level. This is assuming the pool store figures are correct, which is very hard to say.