Looks like the normal green algae film that coats tank glass... just use a sponge and scrub it out manually (if its green spot algae then you may need to put in more effort to scrub them out). Shrimps and shrimplets will naturally move/jump away from the surfaces when you are cleaning them.
Btw, whats the shape of the glass bowl? Looks like its got some curved design.
Bookmarks