In our 29 gallon tank, we have a freshwater puffer that eats pond
snails too quickly for us to establish a snail population there. Once
upon a time, we placed an Apple snail in the tank, but the puffer ate
pieces of it so slowly that it was too painful to watch.

So, we picked up a 6 gallon Eclipse tank from a friend and are using
it to grow feeder pond snails. To add some color to the tank, we've
added two Apple snails that evidently are male and female. Because the
Eclipse tank has a large lid that closes the tank off, we thought that
the Apple snails wouldn't have enough room to lay eggs out of the
water.

This week, we noticed hundreds of Apple snail babies in the water with
our pond snails, but we had not ever noticed an egg sac. After some
investigation, we found that at night when the light turns off, the
female apple snail has been crawling into the DOME-SHAPED LID and
laying her eggs up ABOVE and BESIDE the light. So, we now have two
large egg sacs that will hatch any day now.

DOES ANYONE have a suggestion about HOW to control the Apple snail
population in this Eclipse tank? The problem is the convex and hollow
lid.

Thoughts? --
Ted