Today, I became a 1st ever fish owner. The guy at the store said Bettas don't need filters or anything and they are the easiest fish to take care of. I instantly became attatched to this one Betta that was blue and red and so pretty (I named him Squishy ) anyway...i bought the starter kit with the mini aquarium and food and water conditioner and the plastic plant and blue gravel and followed the instructions...however my poor fishy seems to just like to stay at the bottom and i even tried putting a mirror in front to see if it would react but he didnt...he doesn't seem to do anything, barely moves, and i feel like he's sad. Also, i put food in but just ended up watching it float to the bottom because he wouldn't eat. I'm really scared that something may be wrong. I'm trying to read up on bettas, and now im paranoid that i may have bought a fish before I was ready. I feel awful becasue there's no filter or heater (the guy at PetSmart said they practically take care of themselves and dont need anything) but i feel like i should definately buy a heater and a bigger tank and filter (im looking into buying a 1 or 2 gallon one probably 1 gal.-if anyone has tips on that please help). PLEASE HELP IM REALLY SCARED FOR MY FISH AND I NEED ANY BASIC CARE TIPS THAT ANYONE CAN OFFER! I feel like tomorrow he's going to be dead. ALso, if anyone can please tell me how to clean the tank that wold be so greatly appreciated...really any information or tips at all would be amazing! I just really really reallly care for animals/living creatures and i would do anything to ensure my fish lives a long and healthy life, my best interests are in the fish's needs and i would appreciate it so so so so incredibly much if someone could respond ASAP and help! please please please offer any information for a new betta owner!