Betta Fish Diseases and Emergencies
What size is your tank? Old one is 3.5 l, and new one is 8 l
What temperature is your tank? Old arround 76 F, new 78 F
Does your tank have a filter? Old no, new yes (sponge filter)
Does your tank have an air stone or other type of aeration? Old no, new yes
Is your tank heated? Old no...