Eco Tech Hermit Crab Heat Pad Mat 5w 14 x 15cm The Eco Tech Hermit Crab Heat Mat is an efficient piece to provide heat in your small enclosures and terrariums. Also suitable for small glass fish tanks Suitable for hermit crabs, spiders, scorpions or any small animals. Easy to use Size: 14 x 15cm Contains an adhesive back for quick and secure application Tips on usage: For optimum effect, position the mat as low as possible so that the mat extends below and above the substrate used. The mat can be used on the base of the tank providing there is an air gap beneath the mat once attached. If required you can add spacers to lift the tank. DO NOT use on the base of the tank if a thick substrate is used.