Natural Color Black Aquarium Gravel 2

Dark substrate is the quickest route to making a fish's colours stand out, and 2kg of 2-3mm black gravel is enough to cover the base of a small tank or lay a contrast band in a larger one.

It is not only an aquarium product: vivariums, hobby and craft projects and general gardening all suit it, and it brightens up plant pots nicely.

Specification

• 2 - 3mm (gravel)
• Supplied in 2kg bag

Working out how much you need

To reach a Two Inch (2") gravel depth in your fish tank, measure up and follow these three steps:

1. Multiply tank LENGTH by tank WIDTH in inches. Worked example: 47" Inches x 19" Inches = 893
2. Divide that figure by 10. Worked example: 893 / 10 = 89.3
3. Divide by 2.2 to convert to kilogrammes. Worked example: 89.3 / 2.2 = 40.5 KG REQUIRED

Rough guide for a 2" gravel depth

• 60cm / 2ft TANK = 25 kg
• 80cm / 2.6ft TANK = 30kg
• 100cm / 3.3ft TANK = 35 kg
• 120cm / 4ft TANK = 40 kg

Treat these as approximates - you may well want a deeper or thinner layer of gravel.