white stringy stuff

Hello! I am new at taking care of betta and I need some help. I got a betta for an experiment at my school where we have to keep a closed-off ecosystem alive for two weeks without any interaction. So he was sitting in the same water for two weeks, but he lived. I brought him home, got him in a...

Housing What size is your tank? 5.5 gallon What temperature is your tank? 80 degrees F Does your tank have a filter? No Does your tank have an air stone or other type of aeration? No Is your tank heated? Yes What tank mates does your betta fish live with? None Food What type of food do you...