The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
If the sea apple survives and does well you will also need to be wary of spawning. If a female they release eggs into the water column where they get destroyed by the equipment. The toxins released will kill all fish in the tank in under a few hours. Males will release sperm and should be easily removed by the skimmer unaffecting the animals unless a small tank.
From first hand experience I would opt for taking to the LFS