One local Florida coral grower recently lost several thousand dollars in corals due to a minor plumbing mishap that happened during the night. In one night he ending up with a 5 gallon bucket filled to the brim with dead coral frags. Yes, a years worth of profit can disappear overnight. Coral growers can make a decent living, and they deserve to, but its a lot of time and work and a bit of good luck avoiding the mistakes everyone makes. Its also fixed costs, marketing, loans, frag swaps on weekends, paying for those frag booths just to be able to sell frags, etc.