WOW! No water change, no de-chlorinating water, your write how did they live.The one my dad bought was about 15G if I remember correctly, I didn't know anything about keeping fish, the only time I did a water change was when the water started to go a bit murky, didn't cycle, didn't add de-chlorinator, have no idea how they survived for so long, poor things. The tank I have now for my 3 fancy's is 30G but that's only until I move then they'll be getting split between a 40G and a 35G.