As said, male guppies only are a good selection. Most fish stores sell the male and females separate, so it's easy to buy only males. Besides, the males are the ones with all the fancy color and tails, the females tend to be plain looking most of the time.
20g platy, , 2 x 10g shrimp, 3 x 20g shrimp, 7.5g shrimp and 1 great dane/mastiff puppy.
Sump Pimp #2
My Tanks and my shrimps