How does the temperature in a tank affect the feeding of tropical fish?

Answer 1

The warmer the water the more active your fish become. They eat more when the water is warm. The colder the water the less active the fish become. Their bodies basically shut down. I keep my tank around 78-80 degrees. If the water gets too cold your fish could die.

Answer 2

The warmer it is the faster their metabolism the more they eat, BUT the warmer it is the LESS dissolved oxygen there is in the water (see below), so the fish will become sick, and if you have plants in there, at night they will take out more oxygen as they can't photosynthesise, so you're more likely to lose fish at night time.

The moral is, find the ideal temperature range for your specific type of fish, and try to get your tank as close to the middle value as you can.

100% saturation of oxygen in water at temperatures:
5 degrees 12.8mg/l
10degrees 11.3mg/l
15degrees 10.1mg/l
20degrees 9.1mg/l
25degrees 8.3mg/l
30degrees 7.6mg/l
35degrees 6.9mg/l

so at 5degrees there can be a maximum of 12.8mg of oxygen in each litre of freshwater.

Answer 3

Unlike warm blood creatures fish tend to burn less energy when cold. That said the difference of a couple of degrees is most likely minimal. With cold tolerant fish like guppy it could make a big difference.

Answer 4

*Too cold and the fish will stop eating, Too hot and they wil be starved of oxygen as it is expelled by the water as it heats up.
Ambient tempertures are best for you fish. 70F to 80F is usually best for freshwater tropicals.

Answer 5

basically, the warmer it is, the faster their metabolism, the more they eat

Answer 6

if they are too cold, they are basically paralized, and they won't eat...they won't even move