Help

i got 2 sub sdult leos..

the bigger one shows complete loss of apetite 4 days ago and today i found it developing small tiny white spots on the body..

the other tank mate a slightly smaller one too begin to loose apetite and small spots are apearing..

is it due to stress as i had just move them in to a bigger tank and fist time keeping them together??

or due to external parasites??

stress

pls advice