Who has used washing soda for buffer?

[Aquattro]

Good to know we can get it at a pool supply place. I have one nearby. I'm making my own right now using bulk baking soda.

I think one of the biggest problems I have is that I own a pH meter! Looking at my tank and the growth I get (wanna buy some corraline?), you'd never think there was anything out of whack. I think the problem started by having a reactor that was too small for my tank. I had no problems on the 75. I also have not installed fans over the tank and that may be contributing a bit. I'll know tonight what my alk consumption is, but I'm sure I have a net loss. Hopefully the new reactor will keep the alk up with out adding too much CO2. When the alk is near 4, the pH swing is much smaller.