Man...I posted before I saw the pic. With all the rats you are getting I figured your rack was 4 tubs wide. Cancell my order, you will need just one bucket, 6 Ts, 1 valve and very little tubing, and a lot more of those racks..lol With the number of rats you are talking about I would build my next rack 4 wide, mine is 7 high X 4 wide and I house around 100 regular rats.