Haven't tried shiners as mostly here in Dixie we get tuffies and mosquito fish which also are great for the pond got a bunch out of our local creek when it almost dried up last summer just had to dip net them out of the pools and the pond is loaded with them plus haven't seen one mosquito larvae in the pond this year, so maybe one of the Northern types can answer about shiners but given the right conditions I think all will reproduce. Bob