Sounds like detritus worm and I have loads and doesn't seem to do shrimp any harm. Normally your fish would eat these so you'd never see them.
Thanks for coming to the rescue again. Much appreciated.
Thank goodness. I am always worried about the parasites.
I have noticed there is quite a few snails now. Both the type I want and the ones I dont want. In the fish tank I just dont overfeed and the buggers die off. In the shrimp tank I am not feeding and they are multiplying.
Guess I am going to be on a crunching mission now.