When the moose has an early morning call I check to see what zone(7 zones) is on and then use the other door. They are mostly set up around 4am or so because you dont want to water to early and have the water sit there on the grass for a long period. That promotes some disease and fungus after time. Do it to late and evaporation happens and you waste water. Thats what my (expert) told me.
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