RIP (now times 3)

To my dismay I found the other fantail goldfish and the fancy goldfish (the one that was originally in the pond when we bought the house) floating this morning. Not only that, they must have had a bacterial or fungal problem... the appeared to have "fin rot". This basically means that their fins were disintegrated... little pieces floating around in the pond. *ICK* I could not find the 2 mickey mouse platy, so they were presumed dead. When I found the will to "fish" out the two dead fish (the largest was about 7 inches from head to tail), I found the two little fish at the bottom, alive. I quickly went into rescue mode, trying everything I knew to do to keep them alive. They now reside in a small, empty trash can in my kitchen until we figure out what to do with them. I still do not know why the smallest (about 1.5 inches long) of the fishes are the ones to survive. The water plants, also original to the pond, are now thriving. When we bought the house they looked horrible. Maybe I just have a green thumb and and black pond pump (or the fish equivalent). The worst that could happen now is to find another 2 floaters... poor babies!