I want to purchase some aquasoil for my 10 gal new planted tank. Going for high tech with lighting and ferts. Is 3L enough for a 10gal? Also do I need to cap it? If so would flourite work for the cap?
I have a 30 gal planted tank with flourite red gravel and flourite black sand as a cap. You do not have to cap the substrate, I only did it to better please the eye. IMO
The formula is usually 2 pounds of substrate to every gallon of water which gives you a 2 inch thick substrate. So for a 10g tank I'd say you need 20 pounds of substrate.
I have 3 liters of aquasoil in my mini m and it is perfect. You might want more than 3 liters for a 10, but it depends on the depth you want. For me, 3 liters was about 2 inches.