temp changes
- Thread starter duke33
- Start date
You can get far bigger differences than that just going up and down the water column (in nature), let alone with day/night cycles, so long as it stays within the "comfort" range of the fish and doesn't change suddenly (like 5 degrees in a minute ect) I wouldn't worry.
It bothers some fish more then others.
One example is a fish from the amazon river.
There is very little in the way of daily temp changes in such a large body of moving water, so they would, in theory, by pickier about it.
On the other end of things would be a shallow pond fish, bettas are all i can think of atm.
In a shallow pond (especially in the tropics) they temp will go up and down pretty nicely during the day and night.
Really though, for the vast majority(all?) of fish Volenti is right on, it's abrupt temp changes that are bad, if it sneaks up on them they don't care much.
Just like the difference between jumping into a hot tub and slowly lowering yourself into a hot tub.
One way is nice, the other is rather shocking
One example is a fish from the amazon river.
There is very little in the way of daily temp changes in such a large body of moving water, so they would, in theory, by pickier about it.
On the other end of things would be a shallow pond fish, bettas are all i can think of atm.
In a shallow pond (especially in the tropics) they temp will go up and down pretty nicely during the day and night.
Really though, for the vast majority(all?) of fish Volenti is right on, it's abrupt temp changes that are bad, if it sneaks up on them they don't care much.
Just like the difference between jumping into a hot tub and slowly lowering yourself into a hot tub.
One way is nice, the other is rather shocking
It won't be an issue at all. Depending on the thermometer, the water may not be actually changing as much, but the digi's range a little more than the water actually does.
nomadofthehills;910201; said:
Thats the only way to convince some corydoras species to breed, 10f lower water changes.
(Warning, ramble ahead the facts in which most/all of you i'm sure already know)
[ramble]If the temp drops below or goes above(less of an issue, below is the real killer IME) the fishes allowable temp range one can run into trouble quickly bringing it back up.
Too high of temps is usually only a problem as far as the waters oxygen content goes, the hotter the water the less disolved oxygen there will be.
That, naturally enough, kills fish through hypoxia.
Bring it back down and get more oxygen in and they're fine.
Too cold on the other hand is a biological issue for the fish.
Being fish their body temp is the water temp, and their internal organs are all set up for a specific temp range.
Below that and their bodily functions start to shut down (just like hypothermia in humans).
I did this on accident with some pristella tetras.
After a major water change i forgot to plug their heater back in, and didn't notice untill some of them were upside down on the gravel breathing slowly.
I put my hand in the tank for some reason or another and discovered it was cold!
The fish simply couldn't operate at that low of a temp, being amazon river fish with a happy zone of 70-80f roughly speaking.
I turned the heater back on, and in an hour or two when the tank was back in the 70's they were all back in action.
My Betta, with a theoretical happy zone of 74-84 was happy as a clam, though slightly slower then usual, him being origionally from very shallow waters gives him an advantage i think. Plus of course a few hundred or thousand generations of tank breeding
Really most fish are better off then humans, if our body temp gets down to the low 90s we are in very very large trouble, and into the 80s is generally fatal.
Likewise anything over 104-106 and we start cooking and die that way, giving us, roughly speaking, a 10-14 degree range we can live through, and a 4-6 degree happy range (95-101, very roughly speaking. It varies human to human as well, my gf runs at 96.8 (rather then 98.6) generally speaking.
All that makes goldfish, with acceptable water temps from the mid 40's up to close to the mid/high 70 temps look pretty amazingly durable! (and survivable temps higher and lower)
[/ramble]
Ok, all done for now
