hi iskay
while it is true that coral spawning might crash a tank but still i would like to achieve that kind optimal condition for them to behave as they would in the sea. and profilux controller is able to forfill the moon phase, cloud cover, temperature, current etc. but it is also true that all these will never be as-is-nature. i read an article before that spawning etc might not be related to moonphases etc, but can be of gravity pull of the moon. still, much need to be studied before we can ever come to a conclusion. but still i would love my fishes to enjoy those benefit.
and its really depends on one's belief to see if its worth the investment as these devices can cost a bomb.