I have a fully cycled 10 gallon aquarium, heated at 78 with a filter. and I was wondering what kind of guppies/how many guppies to get. I was thinking to start with a blonde delta guppy, and a tequila sunrise guppie. And wait a week or two. And if they are thriving get another set of 2 guppies. Will that work? I heard to stay away from fancy guppies because they are so over bred. Is that true?