At the Aquatics Live show I went to yesterday in London, they had a seminar on aquascaping. I was very interested to learn that the speaker often sets up low-tech tanks and uses an interesting substitute to CO2.

He doses carbonated water at 1ml per 10litres of tank water. Regular bottled, carbonated water! I was amazed. He said it obviously wasn't as steady as using CO2, but he found it far better and more predictable than EasyCarbo.

I'd like to know, has anyone else has tried this?