So, I started my first 10 gallon fish tank about a month ago and didn't do much research on what particular fish I wanted to get for the 10 gallon tank, so I ended up with a male Swordtail. I researched the fish afterwards and noticed that a lot of sources mention the minimum required tank being 15 gallons, which I regret not looking up. However, he seems to be doing fine and enjoys the long 10 gallon tank, but I do want to get other fish but I'm not sure what I can add to the tank. I've read mollies are good but should be grouped with their own to avoid aggression and I won't be able to fit that many in the tank. I've also found that Platies are good choice as well. My issue is mating, because I don't plan on getting a bigger tank anytime soon and the last thing I need is a 10 gallon tank full of fish. Would you guys recommend just keeping the Swordtail by itself or would I be able to add 2 more fish to the tank. Any recommendations would be appreciated, thanks!