Seachem Flourite Dark 3.5kg Petworks Safe may be used during

Safe may be used during tank cycling to alleviate ammonia/nitrite toxicity

iron chloride

and its high digestibility hardly leaves any contamination in the water

Add some over the substrate during the initial set-up

clearer and healthier aquarium inhabitants

Seachem Flourite Dark 3.5kg Petworks Safe may be used duringDescription Flourite Dark is a specially fracted stable porous clay gravel for the natural planted aquarium. Its appearance is best suited to planted aquaria, but may be used in any freshwater aquarium environment. Flourite Dark is most effective when used alone as an integral substrate bed, but it may be mixed with other gravels. Gravel modifiers such as laterite are not necessary. Flourite Dark is not chemically coated or treated and will not alter