Hi, I have a betta fish in a 2.5 gallon with a Tetra 3i Whisper Filter and a Betta light with several fake plants, a skull, and a marimo moss ball. My fish looks happy and i have been wanting to get him tank mates. So i did some researche and neon tetras were the best choice but they said to have atleast 5 gallons. And i saw a video on youtube of a guys 1.5 tanks with a betta fish and 6 neon tetras. I dont want to but them until i know for sure i can have them in my 2.5 gallon tank. And if you can keep them, would they be sucked in by the filter?