No, the aeration causes pH to RISE, not fall. If you have low pH, it's not from aeration, more likely from Tri-Chlor puck.

You will need at least 5 gallons just to get your FC to shock level. With the way your water looks, you may need another 5 later in the day.

PLEASE read the stickied sections. You are going to need to test your water and add bleach 3x/day.

You may want to get the 5 gallon blue carboys of 12.5% Liquid Chlorine from the pool store--spend the extra $4 on the screw-on nozzle--it's worth it.

Each of these carboys is like 10 gallons of ultra bleach. It can be more convenient, especially when using large quantities. You bring the empty back to the store because they are reusable.