ching, frankly i suggest you sell them all when they are still update.
I went to Shanghai few yrs ago and then all my equipments are OLD when I came back......then you need to decide whether to keep on using the OLD equipment for the NEW tank..or buy some latest technology.............for sure some devil nearby will tell you to buy all new la.....
anyway, u decide la...i just tell u my experience only ( i only have my old skimmer still running in my tank now).....and my OLD toys are too old even for selling, so i just keep them as spare parts only.....but yr case is just six months so maybe little bit diff case.