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Product Reviews
5493 reviews on 1118 products!

ProductsTemperature ControlHeaters
Aquarium Systems Inc. Visi-Therm Heaters
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Product Description:
Aquarium Systems Inc. Visi-Therm HeatersVisi-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.
Product Specifications:
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
User Ratings: (47 reviews)
Overall: 7.16
Value/Cost: 7.34
Effectiveness: 7.09
Quality: 6.45
Ease of use: 7.79
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Found: 47 reviews Page  1 2 4 - View all
Zeb has used this product for 3-12 Months.
Overall Rating: 6.75/10 September 14, 2003
"Be careful....."
I've had two in the past. One broke, all to easy....

the other slowly kept raising the temp, finally to a problem level.

It's not as bad as some, but not really worth the time & effort. Instead, get one that won't need to be replaced in time.
Jason b has used this product for 1-3 Years.
Overall Rating: 4.5/10 August 20, 2003
"Not Good"
Bought 5 of these heaters to place in tanks of various sizes. One year later there was condensation on the inside of several of them. Customer service was great, replaced all the heaters no questions asked; however, two of the new heaters nearly cooked two of my fry tanks. Will never buy another visi-therm.
Evest has used this product for 3-12 Months.
Overall Rating: 9.75/10 August 9, 2003
"Great!"
These are very high quality products, and with any high quality product, you get excellent performance. I have never had a problem with the 2 of them in my 125 gallon, and I am not worried about my large Cichlids damaging them.
blacknotch has used this product for 3-12 Months.
Overall Rating: 9.75/10
"Set and Forget it !!!!!!!"
Very easy to use.Very good quality.No more guess work.Resonably priced at $18.00(That Fish Place)
Set it and Forget
blacknotch has used this product for 0-1 Month.
Overall Rating: 9.75/10
"Set and Forget it !!!!!!!"
Very easy to use.Very good quality.No more guess work.Resonably priced at $18.00(That Fish Place)
Set it and Forget
Little Caesar has used this product for 3-12 Months.
Overall Rating: 9.5/10
"GET ONE!!!"
These heaters are great, accurate, and easy to use. I had a 50 watt visi therm on my 10 gallon for a few months now and it works great. It keeps the temperature consistently at 78 F. The only complaint is that I always have to set it slightly higher than the desired temperature, so for example, I have to set it to 80 to get the water at 78, but it still does the job really well. I recommend them over any other heater and will be getting another one soon for my new tank. Great product overall.
Spearzy has used this product for 3-12 Months.
Overall Rating: 7/10
"Well calibrated"
I use a 200W in my 25G tank and I set it at 78 degrees and the tank stays at 78 degrees. A pleasant surprise from other heaters. It is good it is so accurate because you practicaly need vise-grips to turn the temperature dial!!
goldwave has used this product for 0-1 Month.
Overall Rating: 4/10
"After 2 Weeks Nearly Boiled Fish"
In new 10-gallon I added a 50-watt heater (both packaging and store staff said that was correct size). Set at 76, heater produced 78 degree water fairly consistently. After 2 weeks, came home last night to find tank temp shot up to 85, which nearly killed fish and did kill my plants. Am replacing heater this morning; it still won't come even close to being accurate (now is set at 70 and producing 75 degree tank).
bulldogg7 has used this product for 1-3 Months.
Overall Rating: 9.25/10
"great"
i use a 150watt for my 55gal, the heater is in the sump, the temp in the tank stays at what my heater is set to. relatively new heater though.
since it's in the sump it hardly ever gets banged around, my only concern is that it just looks a little fragile for the price.
ryanlcobb has used this product for 1-3 Months.
Overall Rating: 9.5/10
"All around great"
They're not necessarily low-cost, but not the most expensive either... but my experience has been great, mine is realiable, very easy to use, easy to read, easy to install, and i never have had to worry about it breaking or not keeping up...
laja9801 has used this product for 0-1 Month.
Overall Rating: 5.75/10
"Can't Compete with Ebo"
Had 2 of them and both where bad. Took them back exchanged for an Ebo of less wattage and it did the job much better. Also the whole heater seems a little flimsy in comparison.
Regulator_X has used this product for 3 Years or More.
Overall Rating: 7.75/10
"Visi-Therm a little pricey but a decent Submersible Heater"
A good heater but the adjustment knob need's to be a little bigger around.Have not had any major problems with this heater but it does loose a few degrees every once in a while. I use Visi-Therm & Ebo-Jager the Ebo in my opinion is a much better heater it is more acurate than the Visi-Therm and you can order the Ebo-Jager online cheaper than the Visi-Therm,Anyway yes i would highly recommend the Visi-Therm Heater anything Marineland put's out is usualy a pretty product.
Auballagh has used this product for 1-3 Years.
Overall Rating: 6.75/10
"Low Cost and Effective but Easily Broken"
1) The setting knob is too small.
2) One heater was retired after a years plus use because the setting knob became too stiff to operate.
3) Have lost 2 heaters to incidental exposure to air while on. Exposure to ANY glass part below the recommended max lower limit caused breakage.
4) Delicate. Lost 2 more heaters to being jarred by moving rocks around inside tank during cleaning.
Verdict: I Do NOT recommend this heater! There are much sturdier built ones out there at the same price.
Filhor has used this product for 3 Years or More.
Overall Rating: 8/10
"The best heater I have owned so far"
I started out with the non-submersible el-cheapo units, broke one and electrocuted my fish (tiger barbs, they were a menace, but they didn't deserve to die). The fish store recommended this heater to me, and this is what I have used ever since in the many tanks that I have had. They are completely submersible, which should not even be an option. The thermostat knob is a little small in diameter for my big fingers, but mine just keeps on working so I have no reason to replace it.
MudbugnLouisiana has used this product for 3 Years or More.
Overall Rating: 8.5/10
"A good heater but not an Ebo."
I have used a couple of these heaters. In both cases after a year or so the thermostats went bad. They were good about holding the temperature correct and the adjustment is easy to use.
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Ratings are submitted by Cichlid-Forum users based upon their own subjective views and do not necessarily reflect the opinions of Cichlid-Forum.com. CF disclaims any responsibility for the accuracy of information contained in reviews submitted by users, or for any damage or liability arising from the content of any review appearing on Cichlid-Forum.com. All product information on this site, including descriptions and specifications, is based soley on information made available by manufacturers. CF disclaims any responsibility for this information or the products listed. Product information may be inaccurate and is subject to change without notice. You should confirm all information before relying on it by contacting either the manufacturer or vendor with any questions about the products or the information presented.






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