Another option is PVC pipe "trees", anchored with a concrete block. You can take 1" PVC, cut into six foot lengths. Then, six inches from one end, drill a half inch hole. Spin the pipe 1/4 turn, drill another half inch hole six inches down....do this to the bottom. Then, take six foot lengths of half inch PVC and push them through the holes. That makes one "tree". Then, couple several together and position them to sink into 6-8 foot waters.
Personally, I like hardwood tree limbs, too. Keep this in mind...you are trying to attract fish, both baitfish and game fish. So, you need some cover to be dense, some to be "fluffy". And, for a 3/4 pond, three to five "piles" of cover are enough. Your goal? No more than fifteen percent of the pond should have cover. And, stay away from the deepest areas. Put most cover peripherally.


Teach a man to grow fish...
He can teach to catch fish...