Tiny creatures on the tank wall

[leo lim]

Nowsaday when on the day in the morning, will see the whole tank infested with tiny creatures. I can confirm they are not those microscopic white worm that we mentioned in other thread. This creatures most of the time either stay stationary, if not will hopped around.
Seem that after on-ing the light for abt 1hr, they will be gone from the tank wall.....
Did try to use vermex (that use to remove the white worm) but no effect.
Any bro here can offer suggestion and ways to permanent remove them

Thanks