We used halves of pipes about 6" long. We would keep the tiles at the front of the tank and everyday walk around with a flashlight and check for eggs. At first they are just little clear bubbles but after a few days you'll be able to see the fry forming. I'm not sure daily removal of the eggs is necessary but for our tests we had to have fish <24 hours old so it was important to know the age of the eggs. We had 24 ten gallon aquariums going at all times to ensure a constant supply of newborn fry. Hope this helps.
