Ya, and when you mix your nutes to the water, just pour those nutes in and don't worry about how much.
What a dumb f-ing reply.
To the original poster, even though this is an old post, the proper mixture is 3/4 cups to every 1 gallon of water. This is the same mixture which can be used to clean the walls as well. If it's a bit too strong for your likes just add 1/2 cup per gal, no less.
A cup a gallon as mentioned above it too much. And the guy that suggested to use pure bleach then rinse after is just a moron. Even if you were to only be dipping equipment in bleach it's not a good idea to use full strength. Normal germs and bacteria are 99.9% killed off with as little as 1% concentrate of bleach in water, with the 3/4 cups per gal it gives one about a 4-5% concentrate, more than enough.