i have a 60 gallon tank for 1 angelfish 1 gourami 3 cory catfish 1 pleco (dont say get rid of him im trying to do that) and *GOLDFISH* 2 goldfish. i put the goldfish in there because our pond drained WITH the fish still in there (we dont know how it drained and it still holds water) it drained overnight but all of them were alive (well 2 died ;() so i put 2 of our faverite (and smallest) goldfish in my tank with my gourami angelfish and cories and the seemed to eat fine swime fine and everything and they still act ok but on one of my regular goldfish (i named him lucky because he looked died when i found him but he lived) lucky is getting black spots on his body and a black strip on the end of his tail and some black on his fins below him. im getting woried if i should put him back in the pond or not. my other fancytail goldfish (i named calico) does not have the same thing and i cant tell as good because he already had black spots his whole life. so what should i do i dont want my fish to die