Swell Aquarium Knife Stone

What is Swell Aquarium Knife Stone?

Swell Aquarium Knife Stone is a grey stone that is great for building small stone arrangements in small aquariums. The stone has a dark grey colour, similar to slate, which makes it ideal for contrasting with bright colour ranges in fish and plants. The stones come in two sizes, 0.8-1.2kg and 2.3-2.7kg, so you can create a display in any aquarium made from a single stone or dozens. We recommend placing the stones with other natural materials like wood and live plants for an outstanding look.

Is knife stone safe for aquarium use?

Yes, knife stone is completely safe for use in any aquarium. The rock is unreactive and will not affect water chemistry, so you won't need to worry about disturbing the balance of your tank. The rock is also really good for fish, as it stimulates natural hiding behaviours, and plants, as carpeting plants and moss can climb up the rock easily.