it wont be for a while but when we redo the house i want to add a pond. i was thinking of a topical pond. i live in so cali. it doesnt get to hot and it doesnt get to cold. i have a lot of room to work with but i was thinking how deep can i go? i see some ponds that are a foot or two deep but i was thinking deeper. i am just not sure how deep. its something that if its done i am going to do it my self. anything i should know in the planning stages?