Sick Aussie arowana

[Adiz100]

Okay i have an arowana (saratoga jardini)
it has been sick for one week now , not eating anything moving slowly and its eyes have been cloudy
i heard that is a common sick ness with aros and need water change or something like that
if someone could please give me more info and what i should do
the fish is currently in a 5 foot tank with other fish and turtles.
someone please help !

 

[Koji]

Check your ph. If it's low most probably caused by the turtle's waste in there. It's never advised to keep turtle in the tank with fish for turtle doesnt need the water to survive like fish do.

From what I see, water contamination caused by the turtle.