"The manager I spoke with was very nice to talk with and understanding of the distrust I now personally have for using the heaters in my tanks. She mentioned that although people may talk that something is wrong with the heaters, they actually get very, very few heaters back. So they are not seeing any evidence to support that there are a high number of heater problems. So if there are truly problems with your heaters, I urge you to go through the store you purchased them from and get them replaced so that Marineland can gather evidence of any problems. The place you purchase the heaters will then send them back to Marineland. At a minimum, send their customer service a letter to document the issues, even if it is only the fact that your heater is 4 degrees off on accuracy. They cannot resolve or fix a problem merely because a handful of people claim to be having a problem. " from Debs threadI did not read this whole tread, but I wanted to add that I also had a Marineland Stealth VisiTherm Heaters fail at almost exactly 12 months. I asked PetCo about it, they said I needed to take it up with manufacturer, which I never did. I replaced it with a Pro model, which is going fine for 4 months. It's my own fault it never contacted Marineland, but it's interesting there are so many reported issues.
My own symptoms were as follows:
(1) Heater stopped working, noticed the thermometer was reading 65 degrees one day in DEC, instead of normal 79 F. I stuck my hand in, and it was freezing.
(2) I turned the knob up and down and felt the heater come back on while heater was underwater by lightly clutching in my palm. Water was so cold I could definitely tell it kicked on, even though these heaters never get 'hot' to the touch in my experience.
(3) Assumed all was well, and checked it after an hour or two, and it was back to around 79F. I left it alone again, assuming all was well. I think I set it at 81 to get it to 79.
(4) Next day, checked again, this time it was like 85F! Unplugged and pulled heater out of tank. This thing was all over the map, and unable to either tell when it has come up to temp, or when it was time to turn on. I think I was pushing it too hard with Maine winters, and having to keep tank 20 degree F above room temp. Went to Petco and bought a Pro model, which in hindsight should probably have been a different brand.
(5) Never followed up because I didn’t realize there are many known issues with this heater. But here I am now adding a voice to the discussion in hopes they figure out what the hell is going on.
P.s. NO fish died as a result of going from 65-85 in the course of 24 hours. Or at least nothing died for another week+.
this seems to be contrary to marinelands stance and may add to thier lack of information.
many stores would have you 'take it up to the Mfg'
and after working retail(mgr) for years can attest that some manufacturers prefer to deal directly with the customer.
they often feel they can better service their customers this way.
but like many I have 3-4 failed marineland heaters ..I have yet to send them back as this is an added cost to me that I could better use towards the purchase of a more reliable heater.
however, since they feel that this is not a common issue I may just box all the heater sup and send them to them.
saving on postage and letter of explanation.. I lost over $1000 worth of sof corals in my reef tank and the tank still has issued supporting invertebrates.. i suspect possibly the corrosion of the lead wires feeding the heater may have released a toxin possibly copper.