Which to do first, shock or increase TA?

[derekb41]

I would shock first. (What are you using to shock with?) Actually, it doesn't hurt to add bleach and then a little later, some baking soda. It doesn't have to be days later. Keep an eye on your ph. 7.2 is fine, but you don't want it any lower. Also, since your cya is already 70, you should stick with liquid chlorine instead of trichlor tabs as they will increase your cya level even more.

Thanks for the response. I have cal-hypo 73% that I planned to shock with. I ditched the trichlor tabs, as you mentioned, because my cya was at 150 prior to drain/refill. Just bought lots of liquid clorox 6% to use as part of the BBB method.