Definately you know that your that fish person when you cant go into a store without stopping at the fish. And you have so many that they fill up all your available space. Lastly you know your that fish person when your fish are one of your best friends and you talk to them and greet them everyday.
-when your dining table gets a fish tank just so you can house another betta.
-when you buy a heater specifically for the QT tank but find out in few weeks its to be occupied as permanent heater for a new betta. now you need to get another one just for QT :s
-when tanks take over a desk that you originally planed to use for a totally different use.
-when you require a log book to record notes and water changes as you have too many betta maintenace tasks to remember off-hand.