Jump to content
neo-2FX

Tank Temperature Help

Recommended Posts

neo-2FX

So the whole temperature dilemma in my tank has been driving me crazy and I don't know which reading to believe.

I have:

1. ADA Thermometer

2. Up Aqua Digital

3. Cheap thermometer

All give me different readings!

How can I go about getting an accurate reading, 100%, so that I can calibrate my Eheim Jager heater correctly? Should I need to calibrate my heater?

 

Share this post


Link to post
Share on other sites
jayc

Are the readings vastly different?

Share this post


Link to post
Share on other sites
neo-2FX

1. Shows roughly 22.8

2. Shows roughly 25.5

3. Shows roughly in middle of #1 and #2

Heater calibrated to 24

Share this post


Link to post
Share on other sites
jayc

That's a tough one. Are they all measuring roughly the same spot in the tank?

You can get differing temps in different spots, especially a bigger tank.

Since it's cooler weather, and heat is being lost all the time, I'm inclined to say the water temp is always going to be slightly under the temp set at the heater (assuming the thermostat in the heater isn't faulty). 

So it looks like the cheap thermometer is the most accurate (my opinion). In this situation I am putting more trust in the heater.

 

Share this post


Link to post
Share on other sites
Grubs

Heater calibration doesn't actually do anything.  Its far better practice to read the temp of the water (how else will you know if the heater is working or keeping up with losses?) and turn the heater up or down accordingly - the numbers on the heater knob are irrelevant apart from telling you which way to turn... and perhaps to give you a rough approximation of how far to turn it.

  • Like 1

Share this post


Link to post
Share on other sites
neo-2FX

So I should start by putting the calibration back to factory and then measure?

They were all in the same spot in the tank, just don't know which one to believe.

I'll start over and see what they measure.

Share this post


Link to post
Share on other sites
Grubs

Important - a heater is not a thermometer.  Never believe the heater (they sometimes lie!).   

IMO you always need an independent measure of the water temp, even if its just a weekly whip around with a thermometer.

A heater is not designed to read the temperature of the water.  It is made to repond to the temperature of the water to turn a heating element on/off and other factors will be at play (heat losses, hysteresis, input voltage).  Subtle, but different.  The calibration of the heater will change slightly in tanks of different sizes and with the temperature of the room as these alter the duration of on-off cycles... we don't care about such small variations...but sometimes the thermostat breaks, or we forget to turn the heater on, or the element in the heater partially fails (could be hotter or colder).  The worst types of problems are normally the partial failures that we don't spot - e.g. heater is only putting out 70% of the heat it used to, cant keep up and all the fish catch a cold and die of white spot.

All that said - IMO give or take a degree or two rarely matters.  The real world varies a LOT more than our tanks,

 

Edit:  I would use 2-3 thermometers as you have done - chuck away any that are more than 2C out, and calibrate the heater to the remaining, but know that doing so is just for your benefit of seeing the knob on the heater have the same number - you still cant believe its going to be that temp all the time.

 

Edit... jeeze I crap on sometimes.

Edited by Grubs
  • Like 1

Share this post


Link to post
Share on other sites
neo-2FX

Haha!

Thanks for the help Grubs.

Share this post


Link to post
Share on other sites
jayc

Edit... jeeze I crap on sometimes.

LOL Grubs.

So what was your opinion to the original question?

1, 2, or 3 - which thermometer to believe?

  • Like 1

Share this post


Link to post
Share on other sites
neo-2FX

Is there something, other than a cheap aquarium thermometer that will give me a more accurate reading?

Share this post


Link to post
Share on other sites
kizshrimp

I like to use analog thermometers, the type with the increments marked on the glass so they can't move. Preferably the type with a big scale so they're more accurate. When I buy them I have to go through a whole batch to find the ones that all read the same, ie right. I'll take those and leave behind the ones that are wrong - sometimes more than half the batch are reading high or low. Price doesn't seem to factor in. Once you have thermometers that you know to be correct, you can use them to calibrate others that might not be so good. 

If you don't have any that you know to be right, I you can't really trust any of them. I'd accept the middle value from the cheapo thermometer for now. What does the temperature display on your TDS pen show? 

  • Like 2

Share this post


Link to post
Share on other sites
neo-2FX

Thanks for the reply kizshrimp. My TDS pen doesn't have temperature. I might go buy a few more different ones and see what they measure.

Share this post


Link to post
Share on other sites
al4n

analog glass thermo is the best, but tbh out of 1,2 & 3 i will just go right in the middle of them and go with 3.

Share this post


Link to post
Share on other sites
neo-2FX

Out of curiosity, what heaters do you all use?

Share this post


Link to post
Share on other sites
salvanost

U are not alone image.thumb.jpg.2b64f37ebba6d3d64e976c63

U need to get temp with 0.1 celcius

there tds pen without the 0.1 celcius and it's really not recommended to useimage.thumb.jpg.556fe3fce096c62104195991

dunno about fahrenheit

 

Share this post


Link to post
Share on other sites
kizshrimp

I can't emphasise my last point enough. Check all the thermometers in the shop when you buy and pick ones that all show the same temp, usually in the middle of the range. The quality control at the manufacturers is obviously useless. 

edit - when you're checking themometers to buy, don't put your hands on them, especially not near the bulb part. Not a good way to get accurate readings. 

@salvanost, your pics are interesting. I would normally say those spring-dial type thermos are useless but the glass ones you show are exactly what I like to use. Are the 3 HM meters are measuring the same water as the others? That would mean your spring-dial thermo is more accurate than the glass ones. That would be an unusual situation. 

@neo-2fx, nobody will want to hear this but I use whatever crappy heater I have around. I have been through many brands and many individual units and none really stands out as being better. The old Jager heaters were certainly the best - like the Schego or Eheim pumps. Those days are gone and the eheim jagers seem to fail as often as anything else. They do offer top quality glass and a nice heater surface area, so they're still very good in that way. Strangely I still have several working units of the old HGB heaters, cheap in their day and never considered great quality. Perhaps they should start making them again. 

The best thing you can do is have a fish or shrimp room and heat/cool that - you can't realistically cook or chill a tank that way. Second best is to use a quality aftermarket thermostat and just use your aquarium heaters as the heating element - several forum members go that way. 

Edited by kizshrimp
  • Like 1

Share this post


Link to post
Share on other sites
neo-2FX

Thanks for all the replies. Kiz, I'll go have a look today. Salva, I'm guessing those HM TDS pens cost you a fair bit but they seem accurate?

I'd love to have a fish room which the temperature is controlled... If only haha. Where can I get a quality thermostat?

Share this post


Link to post
Share on other sites
DemonCat

Hi all - similar issue, and I assume I will get similar answers. 

I added a heater to my tank and wanted to keep it at about 22. As advised by my LFS I set it at 24 to then slowly lower it. 

When it was set at 24, the thermostat (which is located on the OTHER side of the tank) was reading 26. I lowered the heater temp by a degree but saw no change. 

After a big rescape yesterday, I put the heater back on at 22, but the tank temp still reads about (again, the thermostat is on the OTHER side of the tank)

ANy thoughts or ideas of what I can do?

Share this post


Link to post
Share on other sites
revolutionhope
Hi all - similar issue, and I assume I will get similar answers. 

I added a heater to my tank and wanted to keep it at about 22. As advised by my LFS I set it at 24 to then slowly lower it. 

When it was set at 24, the thermostat (which is located on the OTHER side of the tank) was reading 26. I lowered the heater temp by a degree but saw no change. 

After a big rescape yesterday, I put the heater back on at 22, but the tank temp still reads about (again, the thermostat is on the OTHER side of the tank)

ANy thoughts or ideas of what I can do?

I think you shluld set up more shrimp tanks.

  • Like 1

Share this post


Link to post
Share on other sites
DemonCat
2 minutes ago, revolutionhope said:

I think you shluld set up more shrimp tanks.

Oh stop it.

But you do raise a solid argument.

Share this post


Link to post
Share on other sites
revolutionhope

Indisputably so

Share this post


Link to post
Share on other sites
jayc
3 hours ago, DemonCat said:

When it was set at 24, the thermostat (which is located on the OTHER side of the tank) was reading 26. I lowered the heater temp by a degree but saw no change. 

Wait ... a heater is not going to cool the tank even if you set it to 22, when the ambient temperature is 26. The tank will be at least the same temperature as the room temps.

What is the weather like in Melbourne?

 

Share this post


Link to post
Share on other sites
DemonCat
48 minutes ago, jayc said:

Wait ... a heater is not going to cool the tank even if you set it to 22, when the ambient temperature is 26. The tank will be at least the same temperature as the room temps.

What is the weather like in Melbourne?

Yeah I must have underestimated the ambient room temp. Our weather the last week has only been mid-high 20s.

I thought lowering the heater may help as I assumed ambient temp would be high teens but may well be warmer.

Edited by DemonCat

Share this post


Link to post
Share on other sites
FMuscle

haha I wish my heaters could cool my tanks too!

Share this post


Link to post
Share on other sites
jayc

Don't forget, pumps from filters will also add a degree or two to the overal temperature.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Similar Content

    • revolutionhope
      By revolutionhope
      Greetings good folk of SKF,
      I'm interested to know what people's experiences are with keeping shrimps at higher than normal temperatures?
      My cherry cull tank had to endure temperatures between 28-35 for several days in a row this summer. All remaining berries were dropped at this time but some of them seem to be in good health still, while others have perished. There are a few batches of juvies in there at the moment and as they mature I am just curious whether the survivors were to breed again and then later generations were forced to survive the summer again and the process repeats over the course of a few years etc etc then to what degree might it be possible to breed a cherry shrimp at is "built for aussie conditions"?
      Keeping shrimp cool can be an expensive and/or hobby-killing exercise and in my opinion it would be a great thing for them to comfortably survive temps in the low 30s (or higher).
      I also know that the person i got my CRS from have told me that they had handled 28C safely at least for short periods. The ones that I got from him coped with several afternoons that reached 27 even briefly reaching 28 - and breeding didn't seem to be effected at all. Could anyone guess how much further the envelope may be pushed?
      love n peace
      will
    • revolutionhope
      By revolutionhope
      hey all,
      i'm just hoping to get some quick feedback/advice on what is the ideal temperature to keep bee shrimp aquariums to facilitate optimum health and frequency of bonking and baby survival :-)
      cheers :-)
      love n peace
      will
    • revolutionhope
      By revolutionhope
      Hi all,
      as subject says - i want advice on what are good thermometers and where to get them please :-) the most important thing for me is to get an accurate room/ambient temperature thermometer (actually i want 2 - 1 for either end of my room. advice on a good "in tank" thermometer would be appreciated too but i am on a budget so this is less of a priority.
      thanks :-)
      love n peace
      will
    • Matuva
      By Matuva
      Actually, it's pretty cold here. During the day, temperature is around 23°C, and drops down to 12-14°C during the night.
      In my tanks, temperature swings from 15 to 20°C
      A breeder told me I should not let my temperature swing that way, that I should use heaters to maintain a study temperature with a 1°C max swing.
      What do you think? I thought this should be a good thing to have this gap of several degrees between night and day, same as in nature? Am I wrong?


  • Must Read SKF Articles

  • Register today, ask questions and share your shrimp and fish tank experiences with us!

    Join Our Community!

  • Posts

    • Cesar
      IME, the healthiest and highest quality has always buying directly from hobbyist, usually a small setup in their garage or fish room. Next was specialty store/importer, last is the local TFS, both often having stock that has been imported, transported and kept in less than ideal conditions... Buying directly from hobbyist has always produced the best results for me...
    • Steensj2004
      Did boil a few times, the water wasn’t completely clear when I stopped cleaning it. So they should be getting some tannins. I was able to remove all but one rock, I have one more piece to put in in its plAce today.   Right on. I’m originally from Ohio, and I’ve been scoping out Flip’s videos and website for a few weeks now. Looks like I’ll be ordering from either Flip or AquaHuna after I get this tank works out completely.   TDS is already down slightly after removing the rock and doing a small water change. I also took the opportunity to remove some plants I wasn’t a fan of and replace them. Indian Almond Leaves came in today too, but my BacterAE is delayed. Thanks Amazon.🙄🙄
    • Goshio22
      Its about 1 cm its definitely of breeding age.. i would be happy if its male, but my eyes is untrained when it comes to fully colored males.
    • sdlTBfanUK
      I would think that is a male IF it is old enough to be able to tell but I think it is maybe too young to tell? This video should give you some handy tips for seeing the differences! https://skfaquatics.com/forum/forums/topic/14104-telling-male-from-female-shrimp/ Simon
    • Goshio22
      Im having a hard time trying to figure the gender of my shrimp.. so i know that virgin females is usually more skinnier than your usual large females..  My shrimp are mostly average grade fire reds, most of the males seems pale in coloration. Can anybody help me?
×