Review on 🏞️ Seachem Onyx Sand Fluorite Substrate by Danelle Gilson

I was curious how much of it was unusable sand/dust so I washed the product through a fine mesh screen which I use to clean the sand (the holes are small enough to wash the main Petco sand). The packaging says the larger pack is about 4.25 litres, and after washing it left 1.75 liters of useless sludge (think of the fine sand from the coast). great shit, there was already a low qpr product that i bought purely because of the color. so much of it is useless is a real disappointment.