hey Sunil! im happy you got your 37 gallon aquarium!
so here are some of my personal favorites:
Platies
Mollies
Guppies
Swordtails
Endlers
All these are livebearer fish and will have baby fry like your guppies!
You said youre trying to sell fish right? Why not sell more than one species?
All these come in various colors, breeds and much more!
Colors go from black,white, blue, red, orange, silver, etc.!
if you want cool fish, these are the ones to go for
Female bettas will be advised if you want to get rid of "some" or "most" of your fry.
Hope this helped!
Oh, do keep me updated on your fish tank!
if you have more questions, email me at
[email protected]