Hi My Axl is 1 year old. 10 gallon tank, by himself, no substrate, sponge filter, hide area. Has not eaten in 10 days. His eating has slowed down in past month. Used to eat every day, then every other day or so. Was eating 1/3 earthworm daily or every other day before or occasional salmon pellets. Ph is 7.6, Nitrite 0, nitrate .5, amonia ~0- .25. temp 66- 68F last few days because temp has increased outside. His is in my basement( coolest room in thehouse) There is a small "nick" in his tail tip also (?) The temp was cooler the last few months. Around 60 F. Could the increase be a problem? I do partial water changes 1 - 2 times a week. When he was younger, he would grab the worm b4 it hit the bottom. Never does that now. He is "scared" of everything now, even food. Anything I can do to help him?