Hi, I looked through the aeration archives and didn't see this question, so here goes: I have a 1-acre pond in southern Vermont, about 12 feet deep, which stocked itself naturally with brook trout through the inlet pipe - I may add some more in the spring. I want to add an aerator system to increase the water oxygenation and help the fish, and am thinking about putting in a solar system to keep my electricity costs down. Here's my question: if I get one without a battery, it is WAY cheaper - the battery-equipped systems are a bit out of my price range. If I am just aerating during daylight hours with a solar system, will the benefits extend through the night-time hours? No doubt it would be better to have it running all the time - just wondering if anyone has had experience with a daytime-only system, and if it is worth doing. Thanks!