no a water pump can not kill a fish
If the jar has water in it with the fish, you will kill them.
Fresh cement will make the water very alkaline and that could kill your fish. There are special treatments available that you can paint on the concrete to counteract this problem. Old concrete should be OK.
definetly not acidic
On an alkaline diet us tunaq fish alkaline or acid
secondary succession
Yes, water that is too acidic will kill fish.
If its outdoors mayby theres an imbalance in the water, with the levels of alkaline.
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
unhealthy water to have can kill from choking
No, it will kill it.
yes they can because they are water fleas