I was looking at both Blennies and gobies and SWM recommended the Blenny as they are generaly easier to feed than gobies he is eating frozen mysis already so pleased with that
Have been using a bit of live brine shrimp overthe weekend all fish and corals look better for it
KH - sea water runs at 7 - 8 kh
Cal - sea water runs at 400 - 425 but we can go a bit higher if we have stoney corals
Mag - sea water runs at 1300 - 1500 but we can run higher
If you are using a good salt then these are achievable without supplementing if you don't have any hard corals