Hi everyone! I�m totally new to solar power but I went ahead and tried to build myself a solar powered aerator for my pond. It works but not as well as I would have liked. I�m on a pretty tight budget so I thought I could run it without a battery, but that did not work for some reason. I got a cheap 100 watt solar panel kit from harbor freight that came with its own charge controller. Then I added a Blue Diamond ETA 80 pump and an inverter. The charge controller would not work without the battery, but even with one, the pump only ran for a few hours and then would have to charge again. Do I need more solar panels? Or should I have a smaller pump? Or is there a way to have the solar panels power the pump instead of just charging the battery? My pond is about a half acre and around 8 ft deep in the center. Any help would be greatly appreciated! Thanks!