I have a male VT Carson, he hates water changes. He darts and acts all psycho when I’m in there so I try to not move stuff around too much. He swam up the siphon once and I’m sure that has made things worse. I don’t know how he got in it, I was in the gravel and next thing you know it happened. Luckily he was not injured but yeah he’s a grumpy skittish one and he bites his beautiful tail especially after a water change! But I love him none the less!