I bought the duncans about 4-5 months ago with 13 large heads and have been feeding cyclopeeze and mysis 2 times a week. Theres probably 30 baby heads forming if not more. It likes down my calc and alk too. Tired of dosing and testing really but it is probably my fav piece, deffinetly the biggest except for kenya tree or xenia. Hopefully it will grow out of control and I can start fraggin.