| Yes, baking soda is a buffer, and would do very well to buffer a tank. But it also acts to raise the pH.
In general, water with a high pH also has a very high buffer, so there should be no need to add a buffer.
The downside of this is that it's nearly impossible to lower the pH. Driftwood and plants simply don't have enough tannins in them to eat through all of the buffer.
The advantage, however, is that you've likely got a very stable pH, which is good for fish.
Most fish will adjust to a high pH. My pH is 8.2 or higher, and I am keeping tetras, otos, glassfish, and bettas, all of which prefer more acidic water. All of them are doing very well.
On the other hand, if you want, your water would be perfect for African cichlids, which really like the high-pH water. So if you want to go that route, it would be perfect. |