SAFETY: Flourish Excel is completely safe for fish, however if you have Anacharis in an aquarium in which you are dosing Flourish Excel, then it is recommended to use it every other day rather than daily.

Is seachem Excel bad for fish?

When used as recommended (no gross overdoses, etc) Flourish Excel™ is safe for fish, plants, and invertebrates, and provides a beneficial source of carbon to the plants.

What is seachem Excel for?

Seachem Flourish Excel is an additive for planted aquariums that is an alternative to gaseous CO2 injection. It is a liquid that you add to your aquarium daily that becomes a carbon source for your plants.