Well I have 100 pounds or rock in there right now and at least half is live. The tanks a 100 gallon tank. So i have 1 pound of rock per gallon. We are getting more rock soon. There is carbon in there now it came with the filter but with my other tanks ( which at FW
) I don't replace my carbon unless I medicate.
In a SW
tank I don't know if it's necessary or not to have it replaced every month. I'm getting mixed reviews here, but there always are, I hear the same thing about fW
tanks. But I never replace mine and it's clear as can be.
As for a protein skimmer, we have a HOB
skimmer that is breaking in at the moment. It already pulled a bunch of nasty smelly stuff out an I'm glad to se it's working. It's an Aero Force 2. I don't know if anyone has experience with that skimmer but if you do please let me know how it works.
I think I'm going to try not replacing the carbon and see how that works for a couple months and then replace it and see if there is difference. Just to see for myself.