Marina Submersible Aquarium Heater, 8.5-Inch, 100-Watt

This is a great heater and for the price you can't go wrong! I had ordered a different brand that was more expensive and returned it because it sucked. This one outperforms the other brand. I will be ordering another one for back up and any needed for addition all tanks. My only wish is that these were carried in store and not have to order online. But I received it in less than 2 days..

Very nice and keeps my fish tank in the proper temperature. It's very easy to regulate it and everything has been great so far.

This has worked very well.

Quality product and easy to use.

This is a good heater for what it is. I have not had any issues so far with it. Heats my water pretty accurately. I researched many brands before buying this but I wanted something that was UL rated. I make fish videos on youtube occassionaly check out FishyBrittyKitty

It is good and reasonable price. The lower wattage heaters are more expensive :). It maintains the temperature within the range. I have not paid too much attention on the exact degree. That does not mean it fluctuates.

Nice aquarium heater. Good price. Adjustable temperature, built-in thermostat keeps water at the proper temperature for your fish.

Great price, accurate, nice looking...I bough 3 to have for spares

great heater. adjustable temperature. keeps the temperature perfect where you set it.

SO disappointed and frustrated. If, like I do, you need a heater which can be placed in a horizontal position, completely under water, this is NOT for you. I wasted money and my precious time ordering this and waiting a week for it to be delivered only to find it is useless for my purposes. This is why I am a firm believer that, as more and more we gravitate away from brick and mortar stores, Wal-Mart and all online commercial sites should be required to post on every product page a pdf of every instruction sheet/manual as well as CLEAR photos of every side of product packaging. This does look like a basically sturdy, decent product. Just a shame they couldn't go the extra mile to add decent seal and make it truly submersible. When I opened the package and read the instructions I was shocked to read: "A. If the appliance falls into the water, DON'T reach for it! First unplug and retrieve it. If electrical components of the appliance get wet, unplug the appliance immediately." (Doesn't sound very submersible to me!) So glad I took the time to read the instructions. I could have electrocuted my 52-year old slider turtle! I've purchased several submersible heaters through the years for both fish tanks and his pond and never ran into a submersible heater that you couldn't submerge!! Oh, well. Back to Square One.