Bio Sand 7.5kg

Aquaforest Bio Sand 7.5 kg is a pre-seeded substrate for aquarists who want a new or existing tank to mature faster. It is sold as a bagged sand that is activated with the two bottles included in the set before it goes into the aquarium, so the setup process starts with a substrate that already carries bacterial cultures.

Why it matters

• Calcium carbonate content: the sand contains calcium carbonate, which the manufacturer states stabilises water pH.
• Included nitrifying bacteria: the set contains laboratory-isolated nitrifying bacteria strains and a nutrient medium to support their growth during activation.
• Activation process: two bottles are dissolved in 3 litres of saltwater, poured over the sand and left for 24 hours with the bag open, which allows the bacteria to multiply before use.
• Grain size and cleaning: the 0.5–1.5 mm granulation is pure sand, and the manufacturer recommends rinsing it in RODI water first to remove dust that may form during transport and cause cloudiness.

Specifications

• Brand: Aquaforest
• Model / symbol: AF BIO SAND 7.5KG
• EAN: 5902026738859
• Package size: 7.5 kg
• Weight: 7.64 kg
• Granulation: 0.5–1.5 mm
• Colour: white, natural sand
• Activation volume: 3 litres of saltwater per set
• Optimal maturation temperature: approx. 25–28°C
• Activation time: 24 hours

What it works with

The sand is designed to be activated in saltwater, so it fits saltwater aquaria where calcium carbonate buffering and a bacterial start are relevant. It can also be added to a running tank as a substrate supplement, as the manufacturer notes. Keep the bag in a warm place during activation, as cool storage is said to extend the time needed for bacteria to multiply.