No, two complete separate systems. The small tank is an Innovative Marine Nuvo Black 30 gallon that I drilled and it runs through a small DIY sump with an Icecap skimmer. Yesterday I installed an ATI dimmable sunpower T-5 over it. The big tank is a Planet Aquariums 200 gallon, you can see the sump on that one. It has the Aquaticlife hybid with 3 AI Primes that I had from the previous system.do you run both tanks off the same sump?