Thank you,

Yes will keep culling the SMB each visit to the pond.

Largest SMB so far was at 14" and it looked good, caught on a 3 or 4 inch green sunfish I caught and culled.

My impression was that the SMB population was/is way out of control and the BG population was nearly wiped out. Restocking BG, RE, FHM seems to be working with the structure and cover I have also added. If I can get teh BG boiling on the feeder I will feel more confident.

Working to correct low Alkalinity as well but PH, etc all look good currently.