I Started my aquarium hobby around 2-3 months ago and I have two female bettas, a halfmoon and a delta tail and they're both in a 5 gallon aquarium along with a racer nerite snail. So far everything has been going well, I cycled my aquarium, etc. and there were no problems. Then about a month ago my halfmoon's tail was a little ripped so I removed both fish from the aquarium, and then after about three days I put them back and nothing happened. Then today I was looking at my fish and my Half-moon's tail is completely destroyed. so I removed the delta tail one and kept the halfmoon in the aquarium. I don't own another aquarium or such so I just put the delta tail back in the container I bought it in. Now I don't know what to do about my Halfmoon, like how long it takes for it to grow back or anything. Here's a picture in the attached file. I hope someone can help me (>-<) please!