Gator, I am by no means an expert, but there have been several to post. The fact that the total volumn is small compared to when it fills, and that it is already on the low side, and it takes time for ag lime to dissolve, this is the perfect time to add lime. If you dont, I think you will be in trouble(or the fish anyway). Maybe I missed it, but has anyone recommended a soil sample to see if, when it is filled, it will still have any hardness? In a new pond, by spring there should be plenty of critters for the small fish without fertilizing.(if it ever rains) What will be the feeding regimen? Maybe we are all getting way ahead, huh? Best of luck. If you or your brother need help with the electrical, just holler.
Maybe Todd can set up the pond parameters; I wonder if he would divulge his chemistry for those nice wipers he posted. and maybe a couple people will come out of the Ga. meeting and volunteer for 2 small pond experiments there.