Great for small/ medium tanks up to 30 gallons! A multi-function internal filter for aquariums, terrariums and small ponds. The Micro Clean 316 is ideal of 10 to 30 gallon fresh or salt water applications. It contains our unique Micro pump 104, with dual intake that prevents debris from blocking the water intake grill. It is also cUL and NRRL/C Electrically Certified.