I had the same issue with my 3 ducks and 2 geese, they could empty a gallon waterer in 45 minutes at 3 weeks...because they play with the water mostly. I think you should hook up your hose and run a waterer like you found off the hose. I am doing something similar for my flock now, only using a huge barrel to supply the water...I am using a Miller's little Giant gravity fed bowl waterer the 2550 version for large fowl (so they can submerge their bills completely). I will post pictures soon on the how to feed and water your flock forum. Honestly ducks must be the highest matinence when it comes to watering... and heaven forbid they have the opportunity to make mud... ugh!
go to www.cutlersupply.com for the little giant waterers...they are the least expensive on their site that I have found on the internet.
go to www.cutlersupply.com for the little giant waterers...they are the least expensive on their site that I have found on the internet.