TL ; I have a Clay pond in Western Oklahoma , Summer days 110F , No rock , I put down 3 12' X 20' areas of road way gravel separated enough to prevent SMB from seeing each other spawn , and SMB are spawning ( Geo textile under gravel to prevent sinking into silt and clay ) . No creek or stream incoming . Seems majority of creatures with Hormones ,find a way . Especially the Sunfishes. Now, to increase fry survival and maybe number of nests , adding large basket ball size rocks will help. Also read Dr. Cody's five part series on SMB , I have to google search to find them , everyone who loves SMB should read this series. Also pictures of nests for SMB , made by Teejaeh57 , find his posts on SMB , and you'll learn much. Hoping the 3 LMB are all same sex , or dead . Last comment , just my opinion , no expert , but my experience , SMB will have a very difficult time controlling BG . When fish seller sold me RES , he decided I needed BG too. 80% BG and 20% RES , a disaster , been fighting BG ever since . Good Luck , May God Bless You and Yours .
