Ya, what Anna said I found too. They find a way over, under, through. Especially when a female drops her scent and males in the other compartments get a whiff, they go nuts and find a way to her. Babies found ways around it too, no mater how much you think it's sealed, I would see yellow babies in the PFR side and vice versa. lol.
20g platy, , 2 x 10g shrimp, 3 x 20g shrimp, 7.5g shrimp and 1 great dane/mastiff puppy.
Sump Pimp #2
My Tanks and my shrimps