Not needed. The baking soda is to get that KH up and you have a good solid KH now. Just monitor. You might check your tap water for KH to see if you will need to add after water changes, or if there is enough in the tap water to keep the KH up.
Zone 7 A/B
Keep your words sweet. You never know when you may have to eat them.
Richard
Thanks again! Whew!