David, I agree that if you keep your water clean for SPS... it might not be so good for LPS as they like little dirty water : )
Once I connect my SPS prop in the back with my mostly LPS T5 tank (Some montis are there due to space issue in SPS prop tank) I try to make my system much cleaner and noticed LPS growth gotten little slower and I also see that I need a bigger skimmer for my SPS so instead getingg bigger skimmer than lifereef VS3-30 I used one HOB skimmer that I used have for my SPS tank. This makes SPS tank itself gets little more cleaner than my whole system and they are connected.
So far so good but I have not run this current system long enough to tell everyone how it is.
So, I have following setup.
100gallon (60x18x20 or 21) display
2x ATI Blue+ and 2x ATI Aquablue (Looks much white than 14k MH so I will put an URI VHO Superactinic back soon)
3" sandbed, 120lbs liverock
Around 15-18gallon custom made by myself SPS tank (24x16x12)
No sand
1x 250W HQI Bluewave ballast with phoenix 14k bulb
Around 30gallon tub from rubbermade (correct?) 30x13x12
No sand
2x 96W PC. 1x Blue bulb and 50/50 Actinc/Daylight
This is my LPS frag station or holding station.
All 3 tanks are connected with 2 sump with mangroves and chaetos. All 3 tanks are fully loaded.
Calcium Reactor.
Main skimmer is lifereef VS3-30 in sump. Carbon.
ETS Seadragon HOB skimmer in SPS tank
This is pics from my T5 light only tank (Yes, sometime ago I used to have one bulb VHO superactinc)
My blastos are on sandbed
Some of my Acans & Micros(Some are sandbed and some are around med)