I would not use baking soda as a way to raise your pH.
If a person did choose to use it - the dosage would not be how may tsp/gallon but rather how many gallons/tsp.
Baking soda by itself is pure sodium bicarbonate.
Will it raise your pH - you bet.
Will it raise the dKH - oh yeah.
But - there is a huge risk of overdosing baking soda.
It has a tendency to drive the pH down a little at first, then has the potential to slowly build up to over near 8.6 pH
If overdosed, and the pH gets too high, your calcium may parcipitate out of solution and the swing in pH may cause undue stress on your tank inhabitants.
Baking soda by itself is lacking some of the other chemical compounds that a good buffer product contains.
If overdosed - it can whack out your water chemistry faster than you can say - oops what did I do.
I totaly agree. And this is why at this point I will not give doseing advice. All factors must be examined before you come up with a fix.
In my opinion - You're much better off using other products on the market such as alkalinity builders and marine buffers to adjust your tank water.
This one I don't agree with. I use no labled products. I Have five Tanks in the house.
ijeh99
Ok you still did not list Alk readings. Or what you are keeping S.G. At, both can also play a role in Alk levels which in turn effects PH. Also Mag Levels. If this value is incorrect you may never balance water chemistry. While you only have a FO tank this is still important. And how you deal with this can also effect PH. As stated before the use of any chemical improperly can effect water chemistry. Including A high priced labeled Product. It's not just important to know PH is low but why it is low. Alk and PH levels work together in a way. If you solve one and not the other then you will only continue to have problems.