Need Id please

[Semperaqua]

I was looking in my lr curing tank, and saw these little bug looking things on the glass they are semi transparent,approx.2mm. Long and they try to swim up then appear to get tired and float down. They don't look like copepoda,I will try to get a pic on ASAP. Thanks in advance

 

[thirty5]

I was looking in my lr curing tank, and saw these little bug looking things on the glass they are semi transparent,approx.2mm. Long and they try to swim up then appear to get tired and float down. They don't look like copepoda,I will try to get a pic on ASAP. Thanks in advance

Pic is important, so many hitchhikers...