The snails are large-i think Ramshorn. Can RES eat the full size snails or will they just be eating the little ones.
Not sure if this is applicable or not, so I'm just throwing this out there as a very recent topic of discussion, but freshwater drum get large and feed on snails. Their effect on a pond has not been thoroughly researched, however, but it is believed that they would not pose a threat to your desired fish population. Just something to possible consider or look into.
