Oh, and I have glass, chameleon and red cherry shrimp in all of my tanks with agasizzi and cacatuoides with enough moss and plants to provide hiding. Riffle shrimp are quite big so should not be an issue. They don't reproduce in freshwater. I would choose a different cheaper species once your plants are growing. And finally, I would be very cautious with pet shops. You will pay a fortune for apistogramma and shrimp and when I have introduced diseases they have always been from pet shops.