And they wont only breed in larger tank. I had some in a 2.5 gallon tank and had them breeding. But how large are you talking ? I think a 40 breeder would do the trick you just have to start with enough shrimp.
To grow them in numbers you may need a larger tank. And I agreed that the guppies will eat the baby shrimp and the flip side I have seen shrimp eat baby.
Really? I tried to breed the two together and I never saw anything fromt he shrimp, I moved the shrimp to my planted tank and I had a population explosion. About a week ago, I cleaned out the guppy tank to change it to another set-up. When I did, I found 4 juvi cherry shrimp that had gotten sucked up and lived. But that made me think, where did all my other baby shrimp go? I didnt have the biggest guppies, but this was also my first go-ahead attempt with shrimp so take the mystery with a grain of salt