Aquavitro aquasolum™* Ideal substrate for planted aquariums and shrimp nano-aquariums* Humate containing substrate* Lowers pH of alkaline wateraquasolum™ is a lightweight, porous substrate derived from humic substances and minerals. Humic substances may increase the uptake of micro nutrients.Ingredients: leonardite, rhyolite, biotite, quartz, feldspar, obsidian, and amphiboleCONTAINS OTHER NON PLANT FOOD INGREDIENT(S):1.12% Humic Acid (from leonardite)