what are the black spots in Glossostigma elatinoides ?

[a-hua]

as pictures,
it appeared on almost the Glossostigma elatinoides and the sand.
when i taked pics, i even finded there are some smaller white things move between the black spots.

what are they and how can i solve them?

 

[rusticitas]

For a moment I almost thought they were eggs, but then realized the scale of things would mean they were extremely tiny.

I'm very curious myself to find out what that is...

 

[Tom Barr]

Not sure, look like snails or some shelled critter.

Regards,
Tom Barr

 

[a-hua]

after your reply,
i start to curious...
unfortunately i do not have a microscope to find out(is it a chance to buy one?).

maybe then i will try some excel.