I see. Looks like the answer is: reduce AFR and add some baking soda. I'm a bit nervous about adding baking soda directly to a 10g tank. Are any of you making your own "Balling B" solution? What concentration? Got plenty of baking soda, which I'm using to bring up my HG salt Alk to the levels it's supposed to be (7.3-->9). Thanks!I will let Lou answer properly but wanted to ask if you have seen the flow chart below on their portal page? I ran across this before and thought it was useful.