overfeed problem please help

Originally Posted by sirwin81

40% too much ah bro??? last time i used to do 20%. then a bro taught me to perform 40 - 50%. Its almost the same actually. Ever since i have been performing a 40% water change
my fish recover frm protruding anus and white shit in 3 days.

thanks all bro for providing useful information , how about water level need to
lower down?