Since you have a SWCG, you might go a little lower with the TA.

Adding the Acid will bring the pH down directly (TA too). The aerating is to bring the pH up (without increasing TA) after reducing it with acid; when your pH and TA are where you want them, stop aerating.

You can always use bleach for chlorination. When you do resume operating the SWCG, pH will probably start to rise - use acid to keep it where you want it.