I used to use Live rock and LR rubble in my sump. I didn't light it and at night it was teaming with pods and all sorts of life. I ended up taking all of the LR out of my sump though. I felt it was too difficult to clean with the rubble in it. IMO it became a nutrient trap. Now I leave my sump clean and sterile. Once a month or so I pull the skimmer out and wipe it down.
If you want to gain the benefit of adding live rock rubble (more rock surface for baterial colonies and hiding places for Pods) get yourself a hang on specimen cup (large ones) and drill holes in it and hand inside your sump - you'll get the same added value as noted above, but without the detrius trapping inside the rock surrounding. If it does, you can always take it out without killing the rock to clean the container.
On my 92 corner, I had little room (actually no room) for a fuge - in sump or hang on, so I did this and lit it with the home depot lite - my chaeto grew so much I had to sell/give away the chaeto. It teemed with life.
I don't have a lot of LR in my display because I wanted room for my corals to grow. I took all the excess LR and put it in my sump. Overtime my sump began to accumulate detritus and I suspected my LR was as well. I also noticed a large spike in my nutrients that 5 gallons a day of water changes wasn't helping.
I decided it was time for a drastic change. I installed filter socks under my drain, removed all LR, macro algae and anything else from my sump (gave it to nanoreefer) and continued with 5 gallons a day water changes. I siphoned out as much sand from my display as I could with each water change. I switched back to phosban from rowaphos and now my levels are nice and l0w.
So yes I did see a change in my nutrient levels after removing the rock, they went down!
I still check my display with a red LED at night and there are TONS of pods in there so the loss of my fuge is negligible.
hahahhaaha,
Dean's referring to the many, many protein skimmers I've gone through in the past year.
Even still my skimmer is gravity fed, meaning half of my drain goes into my skimmer and half into my sump. Any detritus or junk entering my skimmer was filtered out but the other half just dumped that mess into my sump where it would stay. The recent change to a "clean sump" was done a few weeks ago, long after I added my last skimmer.
House's idea of the rubble basket is a fantastic one, they also become "pod piles."
every when do you change your phosban and what skimmer do you use? it seems you like have better results "artificially removing" your phosphates as opposed to "finishing off the cycle" with macroalgae. the simplicity of your philosophy is very appealing. what creatures do you recommend to remove the detritus that forms on the bottom of the tank-or is it just blown away by your water current and skimmed off?