Summer is coming on, and green stuff is forming in my waterers again. I seem to remember that some have posted that they did something to avoid this, and seems like it may have been adding a little bleach in the water. Is this correct? Do any of you have experience with this? If so what do you use? And if you use bleach, how much, so it won't hurt the chickens or make the water taste bad, but still keep the green algae from forming? Thanks for any help.