I would examine the dead fish and look for damage (Bird or cat attack marks like missing scales etc) and signs of disease (Cotton wool like strands, white spots etc) I'd also do a complete water test and remember to check for deadly poisonous things like Ammonia and Nitrite. If that is not the problem, I would empty the pond completely and clean/disinfect the whole thing and start all over again.
it's dead
Some can be found in pond water but not all.
It is a bug that can be found in small shallow puddles or in a pond It is a bug that can be found in small shallow puddles or in a pond It is a bug that can be found in small shallow puddles or in a pond It is a bug that can be found in small shallow puddles or in a pond
Surface of water
Algea, protozoans, and other microorganisms can be found in most pond water.
If its an amphibious turtle, I don't see why it would. a turtle on its back may have trouble on dry ground, but in the water, its no issue, unless it because lodged underneath something.
in a pond
yes
they are usually found in freshwater or pond water
H2O
your mom is in there
rocks