Guppies float at the top of the tank when there is a shortage of oxygen in the water. They also swim at the top when the aquarium is deep, and they need to rest their gills. Guppies do not breathe air. So your guppy isn’t at the top of the tank gasping for air. It’s more likely that the water at the top has more oxygen for their gills. If you want to ensure that there is enough oxygen in the water, the best thing to do is
add some live plants. A simple pump can also help keep the oxygen levels in the water optimal.
Hungry Guppies
Another reason why your fish might come to the top of the aquarium is that it is hungry. If you haven’t fed them in a while, this might be a sign to do so. When
guppies are swimming at the
top of the
tank, look at their mouths. Are they upturned? Upturned mouths show that they are at the surface looking for food.
Sick Guppies
Swim bladder disorders can also cause your guppy fish to float at the top or
sink to the bottom of the aquarium. S
igns that your guppy fish may have a damaged swim bladder include swimming sideways or floating upside down. A
curved spine or bloated look can also be signs of a damaged swim bladder. Gulping too much air or overfeeding can lead to a faulty swim bladder. Cooler
water temperatures can also damage a guppy’s swim bladder. As can various
diseases or parasites. References
- Guppy Floating At The Top Of The Tank? | Tropical Fish Forums – https://www.fishforums.net/threads/guppy-floating-at-the-top-of-the-tank.409270/
- Guppy floating at the top of tank? – https://www.bcaquaria.com/forum/hospital-section-12/guppy-floating-top-tank-33557/
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