Visi-Therm automatic aquarium heater has a unique direct-reading temperature setting feature, which eliminates guess work and makes presetting temperatures very simple. The desired temperature is indicated on an easy-to-read thermometer-type scale and is accurately maintained by the precision thermostat. Visi-Therm is completely waterproof and totally submersible. All these features make it the choice of experienced aquarium hobbyists.
Available in 6-inch length 25 & 50 watts, 10-inch length 75 & 100 watts, 12-inch length 150 & 200 watts, and 14-inch length 250 & 300 watts
I've owned two of these heaters in the past 3 years. The quality is okay but the temperature fluctutes a little more with these heaters and the temperature knob is extremely difficult to turn.. It's an o.k. heater but not up to ebo jager standards for about the same coin..
I bought 3 of these when they came out with the lifetime warranty and my guess is they will be in the red on the books with this product as these don't keep a constant temp, stick and just plain suck. I would not recommend this product to anyone as I believe it is a lesser product in many aspects and I have had issues with all three heaters. I had some of the older ones as well and they seemed to be a little better then the new ones and I would say that a Visi-therm is a Ford while an Ebo is a Lexus.
bstanley1 has used this product for 3 Years or More.
Overall Rating: 9.25/10
November 17, 2004
I have been using these heaters on my tanks for years. they have never let me down. setting it up is trouble free. these heaters are effective and affordable. i will always use visi-therm heaters.
I have had no trouble with the heater except for when I am changing the temp. The hardest knob I have ever turned. I had to get one of those plastic jar openers to assist me in moving the knob. I do like the stealth line of Visi-Therm, durable (made of plastic), black, and easy to set.
I ordered one from Big Al's and after a week in the tank it broke itself. I have no idea how, but I came home and a piece of glass from the side of the tube was laying on the substrate. It just blew right out, all on its own. No fish in tank, never dropped or smacked it, total mystery. Big Al sent me a replacement right out, no extra charge, and I love it. The new one works great and keeps the temp within 1 degree (200 watt model in a 42 galon). Maybe I originally got a bad one or it was damaged in shipping. In any event, they have a lifetime warranty from Marineland. I plan on buying more should I set up any new tanks.
rroads3 has used this product for 3 Years or More.
Overall Rating: 8.75/10
April 23, 2004
"10 Years and still working"
I have 3 of these one is 10 years old the other 2 are the new ones . Seams to work for me .
I've owend a couple of these heaters though I can't remember the sizes. The first problem I noticed was the temperature that it was set at, was NOT the temperature it ran at. If you have one, be sure to test it against an accurate thermometer. Both heaters ended up broken in a box in the attic.
I have had visi-therms in both my 55 gal. and my 10 gal. tanks for 2 1/2 years now and I dont think the temp in either tank has ever varied more than a degree or two. In the 55 i have some large and active Haps and have never had a problem with any fish breaking the heater. A great product!
these must be the most fragile heaters made. whenever my silver dollars accidentally swipes the heater you can actually hear the heating element shake! also callibration is a little off(mine is set to 86f to keep the tank at 82f)but not as bad as Acura heaters.looks like I have to order another Ebo Jager soon.
i have had a visi therm 200watt heater in my 35 gallon saltwater aquarium, after six months of great use, it started over heating the aquarium, i have it now set at 75 degrees, but the therm says the water is 80 degrees, a great heater for six months, after that watch out...
"Marineland should hire me to test thier products."
I've been using the original Visi-Therms for years...the models that were originally designed and owned by Aquarium Systems. I had two 300watt original units in my 125gal. for four years(never gave a problem), finally they started to fail. So the first replacements I had in mind were...Visi-Therms. I noticed that Marineland had bought-out Aquarium Systems and decided to do an overhaul on these heaters. Why they felt the need to do that I do not know. The original heaters were very light, durable, accurate, the thermostat dial turned smoothly and the suction brackets held them to the tank firmly. What else does one need out of a heater? So now comes the Marineland update...The thermostat dial is really a pain in the but when you'd like to raise or lower the temp from inside the tank, one practically needs a friggin' pair of pliers to turn it! Then there's the suction brackets...they could disconnect if a Zebra Danio ran into them! The glass housing itself weighs twice as much with abunch of rubber logo laminate around them, which means more little crevices for algea to grow in, which in turn makes for a more difficult cleaning! Thennn they shortened the power cord by about 6"'s. Thennn they try to brush all this up by giving you brighter packaging with more pictures on the box....Whoooo Caaaares!! Well that's my review, there you have it.
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