|
i have used ponds of about 1.8m deep. no problem, these were fed pellets and could get some stuff off the bottom of the pond casue the netting touched.
these ponds were about 3 times as big as what you are doing and hold typically over 200 big koi and 2000 plus full size goldfish. so your talking of well over a tonne of fish, maybe two. this involved water changes when needed and typically a drop of the rubbish water in those ag pipes weekly. never really lost fish but sometimes they ran out of air after cloudy periods, beleive it or not there was no aeration for years with half that stocking still atleast.
youd do fine with a five to six foot deep pond. if it dont look after your good koi better than a fingerling pond would in the same surface area but shallower id be very very surprised. i dont think youll be stocking them too heavy, they ought to grow pretty quick, though if i were you and you want them to grow quicker and not worry that you may lose a 5000 dollar fish.. then id pay the money for air lifts atleast. if i could show you a photo of the pond depth that i used for fingerlings production and the farm is still rather profitable then it may take away the notion that 6 foot deep is no good.
for bigger fish, id rather them deeper for the stability they offer.
|