SO excited! While we are renovating our house we are also going to get a pond! It is going to be 13 feet x 5 feet x 2.5 feet. I would love some information on kois and goldfish and pond keeping. Any advice and websites would be greatly appreciated. I don't want to set anything up wrong.
Sorry about the delay. I kept missing the few PMs intending to respond long answers but work calls me out lately.
Anyway, if you wish to combine both koi and goldfish, then for goldfish, I would suggest sticking to singletails. No fancies. The info you provided in another thread regarding the climate really does not permit you to try fancy goldfish at all unless you plan to move them indoors every winter season. The depth is fine. 2 feet is bare minimum to ensure the fish will not freeze solid from the stiffly cold weather. You could provide heater as a precaution.