Darlene

Has anyone used this for a planted tank? We are getting a new tank either 55 or 75 gallons and we want to make it planted. I was thinking about mixing a bag of the black sand flourite with pool filter sand. Do you guys think this would work? The bag on Drsfostersmith.com is 15.4 lbs and says that it will give about 2 inches of cover in a standard 10 gallon tank. Thant being said, do you think only one bag of the flourite would do it or would we need more?

sirdarksol

I have mixed fluorite and sand before, and it wonderful for plants. You do need to either stir the substrate up periodically or just get some Malaysian trumpet snails to do the job for you. Otherwise, it can compact around the plants' roots and slowly strangle them.
One bag would probably provide enough iron for all but the most demanding plants, I would think.