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So I'm looking for a heater for a 5 gallon tank that I can use for breeding my pygmy sunfish. Im using 5 gallons as I'm limited for space and have lots of fry. Room temp for my tanks is around 71-72 degrees but it's not really the cold I'm worried about, I just want the temp to stay a pretty consistent 74-75 without having to worry about room temps getting too low. What I'm looking for is a heater that can raise temps only a few degrees and keep it there. I can't find any that I trust enough to buy. Would like something compact and accurate and reliable. 

Edited by Tyler
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54 minutes ago, CT_ said:

I just got this one two days ago for my 14g tank.  It's pretty accurate and really small which is why I chose it.  I can't comment on how reliable it is but it's been running for two whole days now 😉

https://www.amazon.com/gp/aw/d/B07ZNTYCXN

When it comes from Amazon it's a blessing if it works out of the box lol I was considering that one but like every other heater was put off by a couple of the negative reviews

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32 minutes ago, Tyler said:

like every other heater was put off by a couple of the negative reviews

Yeah I had that syndrome too.  I think the thing to understand is that these have a 100% chance of failing eventually.  I adjust mine at a few degrees above what I want and then use a controller to actually turn the heater on and off.  if my controller fails or the probe falls out or something the internal controller will kick in and my fish are just a bit warm.  if the heater fails in the on-state, no problem my controller is taking care of it anyway.  If the heater fails in the off-state, I'll notice when things get cold.  68-70f won't kill any of my fish, just make them mad at me.  If I get around to adding the feature, I'll have my controller text me if something bad happens.

 

 

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I have this for my 2, 6 gallon cubes.  One has been running for several months very reliably, matches the thermometer reliably.  The other has been running just a few weeks but is also matching the thermometer in that tank very reliably.  They also make this in a 35 watt for a slightly smaller tank but I haven’t used that size so can’t speak directly to it, but this one has been good for me.  I like the large display numbers and it is compact enough for me.  I’ve struggled in the past with small heaters being less than reliable for nano tanks (years ago I had a triple row bank of 15, antique, 5 gallon, metal frame tanks).  Newer heaters are soooooo much more reliable than the old days!  

This one is super easy to set the temp and has been dead on temp every time I’ve checked them.  I usually check at daily for the first couple weeks, then least a couple times a week after that, and they’ve been rock solid so far.

 

https://www.amazon.com/hygger-Heater-Aquarium-Digital-Display/dp/B08GFQT2QP/ref=sr_1_5?dchild=1&gclid=Cj0KCQiApY6BBhCsARIsAOI_GjZtUurWvRNBoHUZIcs3nAMm9Ik_nc_S-7vQz6tnlLaO98Lwp2g--qIaAubDEALw_wcB&hvadid=485526078180&hvdev=t&hvlocphy=9027285&hvnetw=g&hvqmt=e&hvrand=2192513221383278721&hvtargid=kwd-1064103765589&hydadcr=22518_11335638&keywords=hygger%2Bmini%2Bbetta%2Bfish%2Bheater&qid=1612985658&sr=8-5&tag=googhydr-20&th=1

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18 hours ago, CT_ said:

Yeah I had that syndrome too.  I think the thing to understand is that these have a 100% chance of failing eventually.  I adjust mine at a few degrees above what I want and then use a controller to actually turn the heater on and off.  if my controller fails or the probe falls out or something the internal controller will kick in and my fish are just a bit warm.  if the heater fails in the on-state, no problem my controller is taking care of it anyway.  If the heater fails in the off-state, I'll notice when things get cold.  68-70f won't kill any of my fish, just make them mad at me.  If I get around to adding the feature, I'll have my controller text me if something bad happens.

 

 

What kind of controller do you use? 

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