Hello again!
Well, it has been some time since I posted anything to this thread! I had some good success with the tank for the past year and then things started to go badly in early November. Corals started browning up and things started dying. :-( Everything I tested for was fine and I started 50g water changes every week. After about 400g worth of water changes things things were still not improving so I decided it was time to do some cleanup. Perhaps something was leaching from the live rock?
I put the fish and corals into a storage bin and emptied the main tank. I then gave the tank a good cleaning and used the shop vac to clean out the layer of silt from the bottom of the tank. I put down 5 bags of sand and refilled the tank. The remote DSB was removed and the rock removed.
The corals and fish were put back in the tank along with a couple pieces of new rock. This was temporary for a couple of days before the re-aquascaping.
I then drained the sump and cleaned out the gunk that had accumulated at the bottom of that over the past year. It wasn't actually as bad as I feared but it was good to get that layer of 'silt' (yeah, let's call it that) out of there.
A few days later Ali, from Amazing Aquariums and Reefs, came by and helped me with the aquascaping. I've always liked the layout he does for his tanks and welcomed him setting up mine. Two days later the tank now looks like this
Already the frog spawn is opening up more and some of the corals are starting to get some color back on their tips.
I'll post some more pictures soon.
Nick