Bests & Worsts Reviews from Amazon

For all those who are looking at this product and are confused about which size should be used for which tank: The large is 18"x8", meant for 50-60 gallon tanks. The medium is 8"x12" meant for 30-40 gallon tanks. The small is 6"x8" meant for 10-20 gallon tanks, and the mini is meant for up to 5 gallons. Hope that helps. As for the product, I've never had a problem with the Zoomed heat pads. Just remember to use a thermoSTAT at all times when using one of these products as they can reach dangerously high temperatures when unregulated.