Hey, I have keep goldfish in a tank for nearly 3 years now and they gave always seemed happy and healthy. I got home yesterday and 2 of them had what looked like long pink poos hanging down between 4 and 10cms long. I fed them some squashed cooked peas as I saw it may have been due to lack of nutrients but got home again today to see that now all except 1 of the goldfish have the long poo type things (have 7 fish in tank in total). I'm assuming it's not poo as it would have dropped off by now and I haven't changed how they're being fed at all so why would there pooing habits change? Any advice or comments greatly appreciated