JKB,
Nothing secret, I have used both AC and DC aerators. The DC was a 12 volt Kasco model which worked very well. The AC was also Kasco, and it also worked very well, but I am looking for smaller aerators for the Topias. I don't care if they are AC or DC because I have both available at the Topias. That is one of the good things about Solar, you have both AC and DC power available!!
I have posted pictures in the past of the solar sprinklers and the solar powered aeration, but I would be glad to post again if needed.
I should have the updated system soon. Life happens and I have not had the time to finish the current install, so I will have to go with a temporary install for now. This fall, I should have the time to do the permanent install.
Oh, and both AL and George are great friends!! Even when Al is in the doghouse.....