A fairly dense number of WE as N8ly suggested could be a good option to keep small YP reduced. Egg collection and removal is also very helpful to reduce numbers of small YP. My main concern with adding too many WE is they over eat the minnows which are also important for imporved growth of YP. Although, occassional restockings of pellet trained YP or cage raising of small YP andrestocking does help a lot to reduce the lack of minnows problem.
