Have no idea what these are, there seem to be hundreds of them In my fuge, on the walls and in the cheato. If you look close they actually look like tiny snail shells, white little circles sometimes swirl like a snail shell, seem to be a little hard and are on the walls of only that chamber of my sump area and in the cheato. One is even on my snail shell now.
Please help if you know what these are. Thankyou.
