Thanks Danny!
No, I actually dont do any! I... really cant explain why this system works..:S Hence why im worried about changing anything! Mandarin does great... the one crocea is happy... my birdsnest and porites grow like mad(both I've had for 2, and 2.5 years, the porites grew from a single polyp to a colony encrusting over small gaps, etc... , and now its at least 6x3" colony after 2 years, the birdsnest was started like this frag at the top of my 33g:
It was grown to about... 3"x3", fragged down to that size again, placed in a new location to encrust, and is now 4x5" and about 3-4" tall. It has also taken on very neat coloration, having an orange body, green hues on it's body, and purple polyps up close.
Anyways, I really dont know how this sytem manages to work. My blastos/acans have lots of new polyps, not as much skeletal growth though. Stuff encrusts really well in the system though. Pulsing Xenia... is no longer doing well. But thats about the only downside.
So mainly, I dont want to wratch anything putting the skimmer on it
Lol.
Chris