I got 3 nerite snails, 3 green Cory catfish, 1 Siamese algae eater, and some shrimp! Problem has been solved now, no more brown in the tank and I do agree with you. This is my first time ever using any type of substrate made for planted aquariums and first time I ever had that problem. Seachem also guarantee their product won't fade in color my black flourite is now grey, red, and some Brown colors from slowly fading