Used for a 5.5 gallon nano tank and so far so good. Didn't pollute the water. Although it's been in the tank for 3 weeks now, it hasn't lowered my pH at all. It's easy to plant, but sometimes the roots can sprout easily I think because the particles are bigger. However the color is dark brown instead of black and it stands out but I really like it. All in all I would definitely buy it again.
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