marineland Precision aquarium Heater, up to 40 gallons, 150-watts

from Melanie

I didn't get to use this for more than a couple hours it filled up with water and began overheating the tank.

from SDGrilli

I bought the 300 watt heater, set it to 72 degrees and two days later my water temp was 100 degrees and all my fish were dead. This was a recommended heater from Petsmart. It is tough when you have had a healthy aquarium for 8 years and in two days the entire system is wiped out. The loss is f...

from SarahSK

I bought this 5 months ago and it worked okay, but it ran very hot. Then I noticed an extreme amount of condensation inside. I returned it because condensation shouldn't happen that soon. It's been less than a day and it's already beginning to have condensation. I am very unhappy with this product.

from David

Works great for my 38 gallon aquarium.

from Virginia

I replaced my other heater because I couldn't tell if it was working or not. This filter has a built-in thermometer and a light indicating that it is working. Plus it has a lifetime warranty