A fish's lateral line feel changes in the water around it.
fish die when taken out of the water because they have gills and fish absorb oxygen from the water and when the fish are taken out they die because of them .
Tropical fish stay at the bottom of the tank when the water is changed.Its because fishes feel a change in water, like the temperature and pH value, due to which they get stressed, so they decide to remain in corner or at the bottom of the tank, until they feel they are comfortable.
The row of tiny holes with nerve endings that feel changes in water pressure is called the lateral line. It helps fish and aquatic animals detect movement and vibrations in the water, aiding in navigation, predator avoidance, and prey detection.
fish dont drink salt water they just feel it
if you are not among
Water changes, water changes and water changes. Keep their water fresh. You could also look at getting a lid, cover or hood for the aquarium. Other than that there's not much more you can do. After all, they are fish!
they get cold
Fish would be harmed by changes to the ocean water
Water changes should be performed in fish tanks every 1-2 weeks to maintain a healthy aquatic environment for the fish.
You should do partial water changes of around 25% once a week. If nitrates are over 40 ppm you should increase the frequency of the water changes and/or the amount to get it down to safer levels.
The most probable reason is that the fish are not happy. This would indicate that the conditions under which they are being kept is not what they require. Basic requirements for most livebearers are 1 gal of water per 1" of fish. Water temperature around 70F and a pH of around 7. Nitrites 0 Amonium 0. I would be doing a few water changes with good water and try feeding the fish with a good quality tropical fish flake food.
Through food and water supplements which is why regular water changes are imperative.