Hi, I will probably be buying some pure endless from a local breeder. I am planning on putting them in my 20 gallon which is already occupied by some fancy guppies. I know they can breed and I really don't want them to, I would like to keep the bloodlines pure. I could divide the tank but then each species would only have 1 square foot of space to themselves and this would most likely not do wonders for the females. My question: Will the endless and guppies crossbreed?