Liquid Carbon

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What is it?

This is a commercial product in bottle form that contains a liquid that you add to the aquarium water in controlled dosages which adds a form of Carbon for plants. It can be use to supplement CO2 use and is used to reduce algae.

Whilst not quite as effective as using CO2, it does provide a ready source of carbon that will not be released by aeration.

There are several forms on the market.


Seachem's Flourish Excel uses Polycycloglutaracetal, the others are believed to contain Glutaraldehyde (C5H8O2), all a potent disinfectant if overdosed.