I got a pond in my backyard I'm going to Renovate in the summer and after watching videos of people with full saltwater ponds I thought about having a brackish pond with Euryhaline fish and inverts. I'm not sure how well this would work where I live( canada) but from what I know brackish species would be able to tolerate stuff like rain and exess nutrients in the water. I was also thinking of using oysters as filtration and base rock for the fish to hide in from racoons. The pond itself is going to be 5 ft long and about 4 ft deep which should be enough just in case we get an extremly cold winter and summer. The only real problem I can see that leaves could fall into the pond and possibly pollute it. Any way if anyone can give me some ideas on stocking and stuff it would be greatly apriciated.