Algae Control With Flourish Excel(플로엑셀로 이끼 제거하기) Flourish Excel is a source of organic carbon that can be used as an alternative to CO2 injection. Though not marketed as such, Flourish Excel has proven to be very effective at controlling algae when used at dosage above the recommended levels. In this article, we will have a look at 3 different ways of using Flourish Excel for algae control: the ..