This is week 3 of my test of “Vibrant.”

Each week I have been adding 10 ml of “Vibrant” to my tank when I do my usual weekly water change.

This week I think the growth of algae and cyanobacter has stabilised. As far as I can see, everything is similar to where it was last Monday.

I would have expected a much bigger growth of cyanobacter and the black “sticky” algae.

It appears that the Vibrant is having an effect.