What is the maximum depth? When you say "spring filled", is the spring water exposed to the air before it enters the pond? How much overflow do you have? i.e. how many gallons per hour?

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).