Natural River Gravel for Fish Aquariums & Pets - Tan - 15 lb General The right half of this

The right half of this is one big rock

up to 10 inches

16" Wide x 12" High

Half of the display is 8" high and the other half is 11" high

these rocks have a high calcium content

Natural River Gravel for Fish Aquariums & Pets - Tan - 15 lb General The right half of thisRiver gravel is one of the most popular choices for aquarium substrate. Being natural, from nature, eliminates the risk of toxins manufactured stones often contain. It is useful for promoting the growth of beneficial bacteria, and if you have a planted tank, it works well to anchor them to the floor. This gravel has been screened and cleaned for your convenience. You will receive 15 pounds of natural river gravel in a mix of tan, brown, and white