Ok ive been fish keeping for many years an always wanted a pond. Cant decide if i want inground / above ground or half in an half out. My question is all my friends that have ponds only keep Koi an they all say the water freezes an fish are fine. Will this be good for other type of fish too. like if i want to put cichlids, arowana, or a redtail catfish ect. How deep should it be for inground? if i make an above ground 4 ft hight will it still all freeze because its above ground? any advice i appreciate! thanks