Fluctuating water temps - is this bad? - Tropical Fish Keeping - Aquarium fish care and resources
 
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post #1 of 7 Old 08-05-2012, 07:16 AM Thread Starter
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Fluctuating water temps - is this bad?

Hey everyone,

I bought a thermometer recently for my tank and noticed when it put it in that the water was reading 17 degrees C.

It's a small 38 litre freshwater tank with one very small Oranda living in it.

I've noticed today that the temp is nearly 20 degrees C and earlier in the week it was down to just below 16 degrees C.

I know the tank is not ideally placed and I've got a much bigger tank and tank location for her to move into but what sort of temps should I be aiming for and variations are considered acceptable?

Thanks all
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post #2 of 7 Old 08-05-2012, 08:32 AM
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These variations are small and happy over several hours, so it gives the fish time to adjust.
For the new tank, even though she's a goldfish, I'd pick up a heater and set it to a good temperature just so it doesn't drop so low. Fancy goldfish are more sensitive that common goldfish and actually should be at at least 20C to be comfortable.

taking a break from fish-keeping.
3 lovely male betta still keep me company.
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post #3 of 7 Old 08-05-2012, 08:47 AM Thread Starter
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Excellent thank you so much for that!!
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post #4 of 7 Old 08-05-2012, 02:17 PM
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How big is the much bigger tank?

I agree, if that is the tanks unheated temp then you should get a heater to set a minimum temp.

The temp fluctuations are largest in small volumes of water. The temperature will be much more stable in a larger tank.

125 - BGK, chanchito cichlid, pictus cats, silver dollars, palmas bichir
125 - cichlids (severums, bolivian rams, chocolate), rainbows ( turquoise, red), loaches (angelicus, zebra, kuhli and horseface), plecos (BN, RL and clown), denison barbs, tiretrack eel, pearl gouramis, betta
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post #5 of 7 Old 08-05-2012, 02:25 PM Thread Starter
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Hi jaysee,

The new tank is 153 litres / 40 Gal

Thank you very much
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post #6 of 7 Old 08-05-2012, 02:28 PM
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That will be a nice upgrade for the fish for sure. Down the road you might find the fish needs one last upgrade, though. Depends on how well you take care of it ;)

125 - BGK, chanchito cichlid, pictus cats, silver dollars, palmas bichir
125 - cichlids (severums, bolivian rams, chocolate), rainbows ( turquoise, red), loaches (angelicus, zebra, kuhli and horseface), plecos (BN, RL and clown), denison barbs, tiretrack eel, pearl gouramis, betta
90 - Congo tetras, african knife, upside down cats, spotted ctenopoma, kribensis, delhezzi bichir
2.5 - betta
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post #7 of 7 Old 08-05-2012, 02:30 PM
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Yup. Oranda are one of the bigger fancy types. I think they can hit 10 inches.

taking a break from fish-keeping.
3 lovely male betta still keep me company.
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