There will be a problem either with the water or the diet. My advice is to do a few large water changes taking all the proper precautions and equalising all parameters. Then I would improve the fishes diet by adding a feed of earthworms at least once a week.
Goldfish excrete, yes.
Yes
Through their anus, same as you.
48kg per hour
Ferrets excrete to get rid of waste
They excrete faeces and uric acid from their cloaca.
Pisces fish excrete waste through their gills and kidneys. Waste products such as ammonia are released into the water through their gills, while the kidneys help filter out and excrete other waste materials.
About 3 and a half kilograms
They "excrete" oxygen, which for them is a waste product. They "excrete" oxygen, which for them is a waste product.
No, urine is not the only waste product that humans excrete. Humans also excrete waste solids as fecal matter, and waste gas - primarily carbon dioxide and water vapor.
All of the organs mentioned excrete waste. The lungs excrete carbon dioxide, the large intestine excretes solid waste, and the kidneys excrete nitrogenous waste.
Yes They do