As far as I know shrimps cannot carry ick.
Yes, ick has different stages, – but they dont jump onto a fish – they develop on the fish, then die off and fall to the ground, but new organisms develop.
Still, I am not an expert on ick, – but I would really recommend that you wait before you medicate, – and describe again, – do you see many small spots ?
Ick – as far as I know – resembles odinium in the way that it is not one or two spots, its all over the fish.
Are you experienced with illnesses and medicating aquariums ?
I am not doubting you, I know from myself, that I can get really nervous and think my fish are sick, and then jump too soon to decisions which arent right. So I am just curious and really would like to help.
Paros are not fish that easyly come down with ick really.