WATER TEMPERATURE

[DiscusAl]

All the books and articles that I have read on freshwater fish give a temperature range for each species.
Is there a high end temperature at which the fish will be in distress or die?
Examples for comment:
Discus at 96 degrees, Good or Bad?
Tetras at 89 degrees, Good or Bad?
If good what is highest temp. If bad, why.
How does one best reduce temp.

Best Wishes to All
DiscusAl

 

[SubRosa]

Discus at 89 degrees:a bit warm for everday but a very successful breeder of Discus that I know raises his temp to 90 as the first step in treating any disease in his Discus.
Tetras at 89 degrees: Be more specific about what Tetras.I tried to keep Diamonds with Discus at 86.They never lasted more than a month or two. Cardinals and Rummynose no problem.
To reduce temp aim a fan so it agitates the surface of the water. You can get a 3-4 degree drop this way.

 

[jm1212]

96º is way to hot for discus. keep them around 83-85º

89º is too hot for tetras as well. they like to be around 70-83º, though most species will be fine around 85º as well when in a discus tank.

 

[The Zigman]

Hmm

My discus tank is 86F
I have about 30 cardinal tetras, and about 20 rummynose in the same 86F doing very well for about 3 years now.

To say 89 is too hot for tetras depends on the species. I actually think cards and rummies prefer the warmer water, and Neons and skirts prefer cooler water. "Tetra" is too generalized.

 

[FishVixen]

My cardinals do better in the angel tank at 83 while the neons do better in the community tank at 78. blackskirts and serpas grow and coloration is better in the angel tank at 83. 96 seems to be pushing it but I've never kept discus so not sure on that one. At 96 I do not think a plant would survive for the tank.

 

[bazil323]

The temperature ranges for each fish that are given in profiles are the recommended best range for each fish. A few degrees above or below that, and they will be stressed at least somewhat and be more prone to disease if kept there longterm. A short exposure to slightly higher or lower temps should not be harmful but perhaps slightly stressful.

Exposure to temps greatly higher or lower will certainly cause a fair amount of stress in the shortterm and any exposure longer than a few hours will almost certainly cause death. Now, the definition of greatly higher or lower may depend on the fish. Sensitive fish like discus probably have a much narrower range that they will tolerate, while hardy fish like mollies will likely tolerate a greater range of temps.

 

[FishTank719]

My GT'S like a warm 85, and when i put in new water thats warm they swim in it loving every minute

 

[jpappy789]

Discus at 89 degrees:a bit warm for everday but a very successful breeder of Discus that I know raises his temp to 90 as the first step in treating any disease in his Discus.
Tetras at 89 degrees: Be more specific about what Tetras.I tried to keep Diamonds with Discus at 86.They never lasted more than a month or two. Cardinals and Rummynose no problem.
To reduce temp aim a fan so it agitates the surface of the water. You can get a 3-4 degree drop this way.

:iagree:

Over a short period of time, maybe, but long term I doubt they would take it very well.

Or you can try floating frozen water bottles in the tank.

Keep in mind that dissolved O2 lowers as the temp rises. Adding an air stone or more surface agitation cannot hurt.