Mean [Si/Fe] versus [Fe/H] for GCs from CAPOS (red stars), other BGCs (red circles), other DGCs (gray circles), other in situ GCs (unclassified as to whether B or D, yellow circles) and ex situ GCs (blue circles). Values for non-CAPOS clusters are from S24, except for NGC 6715 (Meszaros et al. 2020), Pal 12 (Cohen 2004), Terzan 7 (Sbordone et al. 2005), and Ruprecht 106 (Villanova et al. 2013). The symbol size is proportional to age from Valcin et al. (2025). Other than the four most extreme low [Si/Fe] GCs, which are relatively young and generally members of Sagittarius, no strong age dependence is observed.