Perculairs huh? Sounds great! Signed me up for a pair! I believe its from the time they lay the eggs, so about 2 times a month. Hopefully the tile dont spook them or anything. The LFS had some baby onyx clowns, but they were tiny and i didnt want to buy them without them having only 1 bar. What did you use to start your Phyto water? Also, what about rotifers?