Automatic Litterbox Central

We've had a 200 gallon fish tank on it's side in my dining room for over a year now. Just had to do some floor reinforcements so that we could actually put water in it. Well the kitties have played in this thing the entire time we've had them. This past weekend the tank FINALLY made it's way out of the dining room and onto a stand in my living room. Last night my husband finally decided to leak test it and put about 6 inches of water in it. This morning I was about to lay back down after hitting the snooze button but I hear water sloshing and my 14 year old yelling CASTOR TROY!!!!!!!! Seems sweet little Cas thought he was going to get an all you can eat fishy buffet only to discover nothing but COLD WATER