Right, he has to go
I had him in the tub for a couple of days, but then found him on his back, scooting around with difficulty. I panicked, thought the tub had been contaminated with something, and put him in the main tank. I now realise that he was probably just moulting, but I idiotically didnt think of that then for some reason. Saw him the next day, fine, but his front feet with the pincers are significantly shorter, its really odd... the pincers are still there so its not like he has broken them off, I can only guess that it has something to do with his moulting.
Then today, one of my goldies has now got fin rot - the ripped fins have black-tinted edges, and the other had something attached to its eye, which seemed a bit swollen. I thought great, the fin nipping has weakened their immune systems and now one has got some sort of fungus.
But just now, I saw the shrimp attacking its eyes! Properly attacking it, I waited for it to stop then when it didnt had to bang on the glass to get it off. It did the same again a few minutes later, so its back in the tub. These are celestial goldies, so their eyes are quite vulnerable, in fact the reason I got them was because I saw them in the pet shop with their eyes being attacked by some sort of loach, to the point where most were hardly alive. They are only about the length of the shrimp, so not big enough to defend themselves properly. Its poor eye is swollen and bloodshot, and visibly damaged at the side too.
So the shrimp has to go. I have no room for any more tanks, all I have are the goldfish and the betta.