Precision Submersible Heaters

Product No. ML90648

Product No. ML90649

Product No. ML90650

Product No. ML90651

Product No. ML90652

Product No. ML90653

Product No. ML90654

Product No. ML90655

Precision Submersible Heaters is rated 3.0 out of 5 by 27.
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  • Adjustable temperature dial clicks through each degree for accuracy
  • Thermal switch automatically turns off past max preset and resets once the temperature lowers
  • Advanced mica core heating element for efficient heat transfer and enhanced durability
  • Three window positions to view the temperature display
Rated 1 out of 5 by from Faulty safety shut-off I pulled the wrong plug when doing a water change so the heater didn't get unplugged. It was about 50% out of the water when it turned on, completely melted the plastic mounting bracket, but the safety shut-off never tripped. We unplugged it and carefully removed it from the tank, then went about pulling the strings of plastic out of the water. Yikes.
Date published: 2018-02-16
Rated 4 out of 5 by from Love the new look! I bought one of the old Visi-therm heaters about a year ago for my 10 gallon and when that one gave out on me I e-mailed customer service and they responded within one day and helped me get a new replacement heater. So far I love the new design, the black looks alot better than the light grey with the color scheme I have. And it isnt the most "accurate" on teperature -hence why I'm only rating it 4 stars- but then again my last one wasn't perfect either so can't complain.
Date published: 2018-01-14
Rated 2 out of 5 by from Trouble w/ 400 Watt Heaters I've purchased two and both have condensation INSIDE the unit within a week. This is extremely worrisome to me.
Date published: 2018-01-01
Rated 1 out of 5 by from 1 month? I purchased the 400w and it only lasted 1 month. Pretty frustrating when you have a reef tank and have your temps drop overnight.
Date published: 2017-11-23
Rated 5 out of 5 by from Guarantee Great company. It did poop out at plug after about a year, but they replaced it, no questions other than "what is your address?"! Valerie
Date published: 2017-10-06
Rated 1 out of 5 by from Junk I have had aquariums for 40 years. It seems all products have been cheaping out over the last five years and charging ridiculous prices for this non funtional product. These are no exception. I have had it for less than a year. Clearly the seals are no good. The temp hasn't been steady and it started whistling about a month ago. I bought a different brand heater and we will see how that goes. What good is a lifetime warranty if you have to just get another piece of junk from Marineland. I am going to attempt returning to the place of purchase for a refund.
Date published: 2017-08-07
Rated 2 out of 5 by from Heater failure. I've had this heater for a little over ~7 months now and it worked great. Until recently I noticed my fish getting lethargic. I felt the water and it was extremely cold. The heater has not warmed up even after unplugging, turning up the heat and down and I believe it has failed. It hasn't even been a year with it.
Date published: 2017-05-27
Rated 4 out of 5 by from Quality Product and Fantastic Customer Service The title says it all I have Marineland heaters in all my tanks and I typically get about 2-3 years out of each heater but they keep my tank at a very steady temp and when they die they are replaced in a timely manor. I couldn't ask for much more out of a product and company. Photo is for Marineland, you guys kept your end of the warranty up and I kept my word about terminating the old heater.
Date published: 2017-02-20
Rated 5 out of 5 by from Great Features I purchased this heater to replace and older one. I am so pleased with the features as well as the performance. I also like how it blends in with the tank. It's so easy to set and read. I'm impressed!!! As always Marineland has produced a great product!
Date published: 2017-01-12
Rated 1 out of 5 by from Filled with condensation Had it for a week and a half and it filled with condensation and quit working. My tank, canister filter and power head are all Marineland and have been very happy, but this Marineland product let me down.
Date published: 2016-10-29
Rated 1 out of 5 by from Condensation Problem 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.
Date published: 2016-05-21
Rated 5 out of 5 by from Great product!!! I bought this heater a few months ago. It works great. I purchased it as a result of a lesser brand shorting out.
Date published: 2016-03-18
Rated 5 out of 5 by from Great heater I have used many different brands of heaters in my 22 years of fish keeping and this product is the best. Very accurate and affordable.
Date published: 2016-02-14
Rated 5 out of 5 by from Great company that stands behind there product. I have been in the hobby for 20 years and I have always bought these heaters and they have worked for years.
Date published: 2016-01-20
Rated 5 out of 5 by from Very accurate holds perfect temp Awesome heater just set it and forget it. There was no need to baby sit this heater for hours or days like other brands. With other brands I had to buy an expensive calibrated thermometer to calibrate my heater but not with this one I set it and it was spot on. Great product.
Date published: 2016-01-19
Rated 5 out of 5 by from Best Got Better! I've had many Marineland heaters for various tanks. They have yet to fail me. This new Precision model is awesome! It feels more accurate than the previous model, which I still use. I have the new model in 400 watts for my 100 gallon aquarium. It's works so great and has great features. To me, the previous model was the best but the new model made the best better. I have mind fully submerged and in a horizontal position. My peacock bass, bluegill, and largemouth bass are doing well at 70-72 degrees. The temperature stays accurate 24/7.
Date published: 2016-01-02
Rated 4 out of 5 by from Great heater but has a significant design flaw The Good: - Temperature Dial: it shows you exactly the temperature it will heat the water. It also clicks to help you adjust the temperature to exactly where your fish will be comfortable. - Built-in visible thermometer and light that shows you when it is actively heating. - 3-way viewing mounting bracket: this is great if you want to mount your heater to the side of the tank and still want to see the light and thermometer. - Overall design is very sleek with clean lines; this heater is not an eyesore. The Bad: - Problems with water intrusion. I purchased this heater for my 29g community tank in August. In October/November I noticed rust and water condensation on the heating element inside the glass. It stopped working in December. Customer Service was great and sent me a new one free of charge. I think the sealing needs to be improved in order to help it last longer. Don't blame the heater for failing, it could just be the sealant.
Date published: 2015-12-31
Rated 5 out of 5 by from Works great Works great. Click temp set feature a plus. I've had other brands, this is the best.
Date published: 2015-03-05
Rated 5 out of 5 by from This product is great I just got this heater and it works great. My 10 gallon aquarium was at 68 which is way to cold. So I got the visi therm and now the tank is at 80.this product is great.
Date published: 2015-02-05
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