Baking soda only drops PH slightly and it is temporary. I was adding 5 tablesppons to my tank a day and the PH never dropped at all when I measured it a hour laiter but the alk did come up. I fould that 1 table spoon in 100 gal (aprox) would rais my alk by about 1.4 to 1.6 dkh. and when I was having problems maintaining my alk I was using about 2 to 3 table spoons at a time to reset the levels once or twice a week with no ill effects.
I was starting to concider building a baking soda reactor for a bit
Steve
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