I hope I don't sound dumb, but I just don't know how to start the siphon. Do I just put it in and the water automatically goes through the tube? Should I suck the tube to get the water started? I purchased my betta, William, last week, had him in a vase for a few days, then moved him to a 2.5 gallon with a filter. So that's technically one 100% water change. I'm going to need to do a water change soon, so if somebody could tell me how to use the siphon I would be very greatful. :) I'm sure William will be as well.
Also, how often should I do water changes and what percentage? Like I said, 2.5 gallon with a filter.
Thank you in advance.