Yeah I use vinegar/water for cleaning as well. It does a good job getting solid bits up. For sanitizing I usually use a F10 at a concentration of about 1:250 with water.
Mirage came out of brumation on April 26. He was doing great. On May 2 he started acting funny. We just redid his tank, and he keeps going into one of his hides. He just lays there. He shows no intrest in food. HELP!