Join Date: Dec 2012
Location: Vancouver, B.C.
I was thinking of all the things I feed the shrimp in that tank. Zucc, cucumber, spinach, yam. But none of them have dark seeds. It's also odd that there are none there one evening and the next morning there's a large smear of them all in one spot. It is like they are deposited or released all at once. That's why I thought they were eggs, but seeds makes sense too.
They also kind of look like scat of some kind. But I don't know of anything that produces floating droppings once a fortnight.