Temp drop - Tropical Fish Keeping - Aquarium fish care and resources
 
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post #1 of 8 Old 04-21-2010, 08:52 AM Thread Starter
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Question Temp drop

During my weekly water change this morning, I accidently added colder water to my tank than i normally do. Temp went from a steady and always constant 78 to 74. Will a sudden 4 degree drop cause any harm? Tank has neons, guppies, albino corys,and a cpo. My pregnant guppy did drop her fry right after I finished the water change.

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post #2 of 8 Old 04-21-2010, 09:05 AM
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If your tank has a heater, it'll bring the temp up with in a few hours I would imagine..

“The space between the tears we cry is the laughter that keeps us coming back for more...."-- Dave Matthews
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post #3 of 8 Old 04-21-2010, 09:08 AM Thread Starter
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yeh i have a marineland stealth pro heater 150w its a 29g
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post #4 of 8 Old 04-21-2010, 10:29 AM
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how long after you added the new water did you check the temp...i'm sure it's corrected itself by now..

“The space between the tears we cry is the laughter that keeps us coming back for more...."-- Dave Matthews
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post #5 of 8 Old 04-21-2010, 10:57 AM Thread Starter
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I immediatly checked the temp right after the water change. 2hrs later it's at 77 so almost back to normal.
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post #6 of 8 Old 04-21-2010, 12:35 PM
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see, i told you nothing to sweat!! you'll be fine.

“The space between the tears we cry is the laughter that keeps us coming back for more...."-- Dave Matthews
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post #7 of 8 Old 04-21-2010, 12:40 PM
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I've had a few mishaps (due to being a complete and total knucklehead on my part) where my water went from 78 to 88, and once from 78 to 70. I didn't lose fish but I wonder what those extreme flucuations are going to do to their eventual lifespans. A four degree temp change wouldn't cause me concern and I'm sure there will be no long term adverse affect on your fish. :)

If you don't stand up for something you'll fall for anything...
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post #8 of 8 Old 04-21-2010, 01:31 PM
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Kymmie's is quite right, a minor temp change of a few degrees is not a problem for most fish species. Some such as the rarer gourami (Chocolates, etc) could have problems; but the fish you mentioned are accustomed to this in their natural habitats.

The heavy rains that fall in tropical forests always cool the water by a few degrees, and this can stimulate egglaying fish into spawning. Their instinct tells them to spawn at the start of the rainy season, so if you do a water change with slightly cooler water, and do it on an overcast day (low pressure system), it will initiate spawning with many tropical forest fish like characins, corydoras, etc.

I also deliberately reduce the temp a degree or two in my Amazonian tanks; never in the Asian tank though because of the gourami.

Byron.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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