yes
To prevent shock which could kill your fish.
well yea its could kill fish but some of the exhaust push the water really hard so the fish well go with the water and well not get killed
no a water pump can not kill a fish
If the jar has water in it with the fish, you will kill them.
The fish could swallow the contaminated water and get into there system and they could die OR the acid rain could destroy their habitat and kill the plants and greenery.
Yes. The sap from fallen pine needles (conifer) could poison the water and kill the fish.
Yes, water that is too acidic will kill fish.
After it is manufactured, it does not. It may kill fish which could be an environmental issue, but it does not pollute.
Fish will not eat dust. However if there is sufficient dust in the environment and it settles on the surface of the water in an aquarium, it could possibly polute the water and kill the fish by clogging up their gills.
no it freaks the fish out and could kill them if done to much
No.
A large group of pirahnas could kill a human