Grey common gravel, 3/4 inch

Grey common gravel is washed, screened, and bagged in 1 lb and 5 lb weights. The nominal grade is 3/4 inch. Individual shapes vary. Check the material against a sample opening or screen rather than relying on a photograph for fit.

An open aggregate creates spaces between pieces. Whether those spaces remain open depends on the grading, bed depth, water movement, and what enters the bed. A bag of stone does not turn any container into a working filter. Plan solids removal and a way to reach the material for cleaning before burying pipes or filling a compartment.

For pond and drainage projects, distinguish structural drainage from the planted filter bed above it. The right aggregate size follows the filter designer's specification. Do not substitute coarse drain rock for a specified fine gravel simply because both are called stone. A media basket also needs openings small enough to retain its contents without obstructing flow.

The chemistry of this product is unconfirmed. We do not promise that it leaves pH, alkalinity, or hardness unchanged. A vinegar observation, when one is recorded, will be reported as an observation rather than used as a universal safety claim. Any aquatic use needs the material's confirmed information and a plan for monitoring the system.

Loose gravel is not suitable for every animal. Swallowing, abrasion, and trapped waste are separate considerations. Keep material away from animals that can take it into their mouths, and do not use it as a turtle substrate by default. Rinse loose dust away before arranging it. The calculator is a volume-to-weight estimate; shipping follows the actual bag mix and configured box capacities.