Ok thanks for the reply, conferring with a colleague today and we confirmed them as Dove Snail egg capsules, the Macro was recently bought (UK) but came with an import licence, wasn’t sure if the eggs are from the sellers tank or if they were hitchhiking before import, thought I’d try here first before harassing the seller with messages.
Now I know they are something beneficial and not harmful they get to stay as they are a species I don’t have yet in the tanks.