Update: No bulbs yet, as they havent arrived from the supplier.
I also installed the co2 reactor. It is the Dupla S Reactor.
It can go in-line, but my cannisters pipes arent 9/12mm and I'm not keen on the idea of reducing 16/22 down to 9/12mm.
I was using this reactor in the other tank and it was very effective, So I will continue to use it until I get an Aquamedic 1000.