Sodium bicarbonate vs sodium carbonate

[Reef Pilot]

Originally Posted by Myka

It probably does. Most SPS tanks will start to suffer below 7.8 and above 8.4. Ideally, you want to be around 8.2-8.3, but as Chin says, don't chase the pH too much.

Well, in that case I should maybe switch back to using carbonate. That is supposed to keep pH closer to 8.3. I still have a fair bit of bicarbonate left, though, so won't happen for a while yet. Meanwhile will do some pH testing at different times of the day, and see what mine is really at.