Flourish Tabs are tablets designed to be inserted in the gravel of a freshwater planted aquarium to provide a source of important plant nutrients (see Guaranteed Analysis for complete listing).
DIRECTIONS: Insert one Flourish Tabs in the gravel for every 10-15 cm (4-6 in.) radius. Tabs should be replaced every three to four months. Tabs will not alter pH, but, in very soft or unbuffered water, they have slightly acidic properties similar to peat moss.