I have a 20 gallon with quite a few plants, hob and sponge filter. There is 1 male Dalmatian Molly, 1 female Dalmatian molly, 3 female gold dust mollies, 7 cherry shrimp, 1 mystery snail and some pest snails. All the Mollies are short fin and should only get a few inches supposedly, compared to sail fin which get 4 or more. I was thinking about maybe adding 3 male endlers. Do you think I would be ok or should I just wait and see how big my mollies get?