hey Allan...any drawbacks to your multiple systems plumbed together?

yes, the new sump will be about 100g

I'm still leaning towards plumbing these two systems together to simplify things...

only real con at this point in my opinion:

1) if something goes bad all corals could be affected and at the moment the only real main concern is...pest eggs not caught in the dip/acclimation process of new corals