I have a half-moon Betta at my work. I clean his tank every week. He gets fed twice a day since he doesn't get fed on the weekends. Well my husband and I are going out of town this Thursday. We will be gone 11 days. I have him in a small Betta Box tank. We do have a 10gallon empty tank at home. I am worried about him not having a water change and it hurting him. Should I take him home and put him in the 10g tank? It is unfiltered. What is going to be my best option while we are gone?