Tha most likely means it needs to be cleaned. or something is wrong with your filter.
I think it is very dirty and needs to be cleaned.
only if you catch it then put it in fresh clean water for 1-2 weeks
if you just bought the fish let the water in the bowl sit out for about 24hours before putting it in. But make sure that your water has no chlorine in it. NO tap water. If you use tap water you have to get water cleaning drops for the tank.
yes, in order to keep your fish alive, it's best to clean the fish bowl as often as you can.
weekly 10 - 20% water changes
I believe you are thinking of the Clean Water Act which set standards for water quality in America.
Scoop all your fishes to another tank or tub of water and clean the fish tank just as you would normally without the fish
The water may need to be replaced with clean, more oxygenated water. Of course, treat the water as you normally would before putting the fish in it.
Algae will develop in untreated water turning the water green and or foggy. If it is a swimming pool, and you don't mind, it can be treated with chemicals that you can get at the big box hardware stores or a pool supply place. If the pool is for fish you can use a biological filter and pump system.
If they are in a tank, make sure they are fed and the water is clean. To clean the tank, remove the fish and put them straight into another source of water. Remember if your fish is salt or fresh water. If the fish is in the sea, river or pond, its best to leave it. If the fish is on land near a water source, replace it in there. If it is nowhere near a water source, I have no idea how it got there. You would have to leave the fish then. Sorry if this answer is vague, because your question was as well.
well i haven't done that but when i clean out my tank i put my fish in a clear glass cup with water.
Some animals that can only live in clean water is salmon and trout. Frogs can live in dirty water but they thrive in clean water.
What I would do is, first turn off the heater, lights and filter. Then I'ld syphon some water from the tank into a clean bucket. Next I would net the fish and place them in the bucket. Then I would syphon most of the remaining water from the tank trying not to disturb the gravel or plants too much or leave them to dry out. I would then refill the tank with water I had kept overnight in clean containers to allow the chlorine to evaporate off. Alternativly you could use a commercial water conditioner available at pet shops to counteract the chlorine/chloromine in the tap water. Then I would turn everything electrical back on not forgetting to clean or replace about 80% of the filter medium. Maybe a little hot water would be required to equalise the temperature of the water in the tank with the water in the bucket and then if I was happy with everything being ready I would replace the fish in the tank.
If there is water that is clean then i would say fish and animals on the freezing area.
wash it off with water
The only instrument that you need when cleaning a fish is a knife. You can clean a fish anywhere as long as you have water. Some places have restrictions on where you can clean a fish.
When you are changing the water in a fish bowl, you have to empty cup ot bowl with water in it. Then, put it into clean water.
Yes. Just as humans need clean and uncontaminated air to live in and breathe, all fish need clean and uncontaminated water to live in and breathe too. The purpose/use of a filter is required to remove the natural poisons from the water that all fish make simply by living, eating, pooing and breathing in the water. If you could give the fish a constant flow of pure, clean, unadulterated water, then there would be no need for filters.