In my 10 gallon tank I have one Angelfish (medium size) and one fancy guppy left, all the others died. I thought the one I have left wouldn't make it too much longer being the only one and being a community fish, surprisingly he's doing great. I noticed the other day my Angelfish biting at his tail. At the moment I have the guppy in a breeder net in the 10 gallon so the Angel can't get to him. My question is I have a half-gallon tank
Marina Betta Kit - Aquariums - PetSmart If I put the guppy in this tank would he survive or does he need a filter, air pump, and heater?