It depends on where you have the water supply. If the water is coming down from the top, they're a little too Deep. about 3 or 4 inches deep is good unless you have another way for the hoppers to reach the water sippers.
Last edited by MarkS; 12-12-2008 at 04:30 PM.
Reason: clarification
Im using the mixing tubs with the water valve on top and having no problems, they jump to the top and drink upside down.
I've seen that too, but I'd be worried that not all of them are strong enough to get up there. Of course you could stick a brick or a chunk of 2X4 under the water sipper just to be on the safe side.