Dump most, if not all, of the pods in the refugium to let them grow. The 6line will eat up every one it can find in the main tank. You will need to have rubble piles or some other in-tank refuge for the pods to escape & breed within your display. Unfortunately, 6 lines are notorious for being pigs & starving out other pod eaters. They're fast & can get into small spaces. Ideal pod-hunters. If you want to keep Mandarin dragonets or something like that, best to consider finding a new home for the 6 line, but good luck catching it.
Anthony