Blue Spotted Under Tank Heater, Terrarium Heat Pad, Medium, For Reptiles, Amphibians And Small Animals And Use with Glass Terrariums - Size Medium - 8 Inches x 12 Inches The Blue Spotted Under Tank Heater is an ideal primary or secondary heat source for tropical & temperate reptiles, amphibians & small animals. Use with Glass Terrariums - Size Medium - 8" x 12" Focuses heat to desired location and is an energy efficient low wattage external heat source. Excellent secondary heat source Easy to install, adhere directly to glass terrariums for maximum heat transfer Size Medium - 8 Inches x 12 Inches, use rubber standoffs to avoid overheating for bottom mounting. 16 Watts, UL Approved Other Blue Spotted Products to Consider: clamp lamps, wire cage lamps, heat emitters, UVB lamps, mercury vapor lamps, & betta plants & betta log. Also consider Aquarium Masters airline tubing, air stones, and power filters