I have a trap like that, but not that one, you know on that link, the one i have is the product above it, and it does the job fine for keeping just fry in it, but the female swordtail that is carrying, she dont like it one bit, so i dont bother putting her in it, so i have two ways about it, i do have another breeding tank, which is the mesh net, and it works wonders, also brillant for keeping aggresive fish in and calming them down, but at the moment it is also full of fry, i have too many, because she is giving birth too quickly, but what i do, is i let her give birth in the tank, yes their are tank mates, but they all have their own section in the tank and so i know exactly where to find the fry, because she always gives birth to them in the same place, but once she has done, i just hook them out quickly and put them in the breeding net, but i aint too sure whether or not i will be ready for this next set, not unless Nemo grows up faster!
lol