The water is pretty hard. Heavy "hard water build" up on the Well pipe that flows into the pond. My pond is pretty loaded with the bream. I will try to get Shinners started as well as you mentioned. The pond I know of near me that has 4- 30 plus inche tarps (one 36 incher at least) and two nearly 30" snook is loaded down with BG and shinners. It is a really tiny pond. Actually that one seems like those big predators are not keeping up with the the BG. tons of stunted BG and large schools of shiners and of coarse lots of tilapia. When I would feed the BG pellets the tarps and snook would exsplode on them. Pretty cool to watch