Oh believe me, I'm going to be so careful about checking where plants were grown from now on! I'll interrogate anyone, and if there's any doubt, I won't buy them. I learned my lesson the hard way I really owe you even more thanks - I would have had no idea what was killing my shrimp if you hadn't let me know about the pesticides outside the EU thing.Make sure their plants are grown the EU. Just because it's MA doesn't necessarily mean they are shrimp safe.
Saved five more little shrimp from the OG tank and moved them with the rest of the colony this morning. They hid well! I was convinced I'd got them all. They're small though, might have only coloured up this week.