Is this heater safe?

  • We are currently upgrading MFK. thanks! -neo

Brickosaurus

Jack Dempsey
MFK Member
Dec 11, 2022
240
89
36
20
16713132679916962213406493056184.jpg

Would this be safe to use? This is a heater I found at the thrift store. I went with a 30g tank.

Just to be safe I ended up getting a new one for my tank.

So would this heater be safe to use on a future aquarium? Or should I just throw it away
 
  • Like
Reactions: tlindsey
Could be safe, but why gamble.
I used to make it a standard practice to buy new heaters every year, and change them out at the end of a years use whether or not they looked bad or not.
Or if I stick my hand in a tank, and get an electrical tingle, the heater is the first thing I check, because it operates under the most harsh and volatile conditions of all out gear

After I had a couple that failed in the"on" position, and almost cooked fish, I decided this is the one neseccary component of fish keeping that I should not scrimp on.
 
If those are goldfish in the photo, they don't need a heater, room temp is good enough.
And that goes for fish from northern China and Korea like Paradise fish, and white clouds, it also goes for fish from southern South America, (Uruguay, and Argentina)
1671316427365.png
Above Gymneophagus from Uruguay
or fish from high altitude habits like Denson barbs from mountain streams in India, or certain high altitude mexican live bearers.
Below Xenotoca eiseni from Mexico
1671316571289.png

1671316751007.png
 
If those are goldfish in the photo, they don't need a heater, room temp is good enough.
And that goes for fish from northern China and Korea like Paradise fish, and white clouds, it also goes for fish from southern South America, (Uruguay, and Argentina)
View attachment 1509054
Above Gymneophagus from Uruguay
or fish from high altitude habits like Denson barbs from mountain streams in India, or certain high altitude mexican live bearers.
Below Xenotoca eiseni from Mexico
View attachment 1509055

View attachment 1509056
Oh no! The fish are just in the background!

I would never put a heater in a goldfish tank unless in some kind of emergency
 
I dunno...I'm too cheap to just toss something like that if I already have it. I wouldn't have bought it...but if I found it in my basement or something, I'd check it out. Is it cracked? Does it have calcium deposits inside the tube, or are they all on the outside? If not cracked and if clean inside, maybe delve a bit deeper.

It looks like its supposed to be fully sealed and submersible. I wouldn't trust that feature anymore; mount it with the control end exposed at the water surface using a bracket. At the very least, drop it underwater (not plugged in) and check it a day later for moisture visible inside. If it's wet inside, it might still be fine to use (after it dries out) as long as the top is not submerged. It wasn't that long ago that all heaters required to be mounted that way, as they were not sealed. For a long time in Canada, after submersible heaters became available, they were still required to be marked with a water level line beyond which you weren't supposed to mount them according to the rules.

Crusty calcium deposits on the outside of the tube can be cleaned up with some vinegar or CLR and some elbow grease.

I also wouldn't trust it in too small of a tank. Stuck thermostats and boiled fish are less likely if the heater wattage is just barely able to heat the tank adequately, usually 2 - 5 watts per gallon depending upon ambient room temperature and how warm you want your tank. If you put a heater capable of heating 100 gallons into a 10 gallon tank, and if it is in good working order, it will work just fine; it'll just switch on, heat the water quickly and then switch off after only a short period of time. This constant on/off/on/off is tough on thermostats...and if the thermostat goes bad and gets stuck "on", the high wattage will very quickly overheat the tank to dangerous levels. If the heater is just barely big enough for the tank it may not be capable of overheating the tank too badly, and it will take much longer to do so even if it can.

Finally...and I know many people ignore this or think it's overkill...I always unplug a heater before touching the water with my hands to do any work in the tank. If the water in the tank is energized by a broken or leaky heater, the fish will likely look fine...but if you are grounded, perhaps by touching a grounded metal object or standing on dampness...and you touch that water you will get a jolt. Any time electrical components like heaters, power filters, etc. are used in and around aquariums, they should always be plugged into a GFCI-protected circuit. If you have a GFCI breaker in your electrical panel, that's ideal; but you get identical protection from a GFCI receptacle mounted in the wall where you plug your aquarium stuff in, or can even get a GFCI-protected powerbar for the same purpose. GFCI protection senses dangerous voltage and shuts off so fast that you don't get shocked.

The fact that you got this at a thrift store sort of implies that you are a cheapskate like me...so you don't need to automatically throw away this heater without at least cleaning it up, examining it carefully and trying it out. It might continue to work for years...or it might crap out tomorrow...or it might not work at all...but at least you'll know.
 
I dunno...I'm too cheap to just toss something like that if I already have it. I wouldn't have bought it...but if I found it in my basement or something, I'd check it out. Is it cracked? Does it have calcium deposits inside the tube, or are they all on the outside? If not cracked and if clean inside, maybe delve a bit deeper.

It looks like its supposed to be fully sealed and submersible. I wouldn't trust that feature anymore; mount it with the control end exposed at the water surface using a bracket. At the very least, drop it underwater (not plugged in) and check it a day later for moisture visible inside. If it's wet inside, it might still be fine to use (after it dries out) as long as the top is not submerged. It wasn't that long ago that all heaters required to be mounted that way, as they were not sealed. For a long time in Canada, after submersible heaters became available, they were still required to be marked with a water level line beyond which you weren't supposed to mount them according to the rules.

Crusty calcium deposits on the outside of the tube can be cleaned up with some vinegar or CLR and some elbow grease.

I also wouldn't trust it in too small of a tank. Stuck thermostats and boiled fish are less likely if the heater wattage is just barely able to heat the tank adequately, usually 2 - 5 watts per gallon depending upon ambient room temperature and how warm you want your tank. If you put a heater capable of heating 100 gallons into a 10 gallon tank, and if it is in good working order, it will work just fine; it'll just switch on, heat the water quickly and then switch off after only a short period of time. This constant on/off/on/off is tough on thermostats...and if the thermostat goes bad and gets stuck "on", the high wattage will very quickly overheat the tank to dangerous levels. If the heater is just barely big enough for the tank it may not be capable of overheating the tank too badly, and it will take much longer to do so even if it can.

Finally...and I know many people ignore this or think it's overkill...I always unplug a heater before touching the water with my hands to do any work in the tank. If the water in the tank is energized by a broken or leaky heater, the fish will likely look fine...but if you are grounded, perhaps by touching a grounded metal object or standing on dampness...and you touch that water you will get a jolt. Any time electrical components like heaters, power filters, etc. are used in and around aquariums, they should always be plugged into a GFCI-protected circuit. If you have a GFCI breaker in your electrical panel, that's ideal; but you get identical protection from a GFCI receptacle mounted in the wall where you plug your aquarium stuff in, or can even get a GFCI-protected powerbar for the same purpose. GFCI protection senses dangerous voltage and shuts off so fast that you don't get shocked.

The fact that you got this at a thrift store sort of implies that you are a cheapskate like me...so you don't need to automatically throw away this heater without at least cleaning it up, examining it carefully and trying it out. It might continue to work for years...or it might crap out tomorrow...or it might not work at all...but at least you'll know.

Ok! I'll definitely clean it and put it in some water!

Just to be clear. This came free with a fish tank that I got from the thrift store, I didn't pay for it
 
  • Like
Reactions: tlindsey
duanes duanes I have not yet seen any fishkeeper around here keep denison barbs low as 65 degrees. Most of the setups all have had heaters with clown loaches etc. Is there any article out there explaining their biotope/habitat ? I am interested in keeping species in my basement that has temp from 63-68 year round. Is it good for the fish to keep it in heated conditions if they are not from the tropical waters?
 
  • Like
Reactions: celebrist
Ok! I'll definitely clean it and put it in some water!

Just to be clear. This came free with a fish tank that I got from the thrift store, I didn't pay for it

Whatever...you've got it now, so give it a shot!
 
  • Like
Reactions: Brickosaurus
MonsterFishKeepers.com