May I know your tank volume, towers dimensions and are you running skimmer or Calcium reactor?
Glad to hear it works well for you. I am just making this DND for my small 40 gal tank for trial before jump to my big systems, each 800 gal for coral farming
I currently have a 90 gal display corner tank (that is why my Sump is so limited in space) and a 20 gal display fuge that i made. The sump feeds both the DT and Fuge. There are about 15 small fish and two shrimp (pistol and cleaner).
In the sump I have the following:
Euro-Reef Skimmer - real old cheap one I got on craigslist but fits and seems to work
Porous brick under skimmer (about 8"x6"x1.5")
Heater
Roller Mat
ATO - home made
CO2 Scrubber - home made
Algae Scrubber - Santa Monica Drop
Return pump (two, one for DT and one for Fuge)
I used to be much better at maintenance, so you will see that it needs a good cleaning. The display fuge houses a couple of breeding cardinalfish because I break too many corals trying to catch the male when his mouth is full of eggs.
I am currently dosing (per day)
2ml NOPOX
58ml each of ALK and Calcium ESV B-Ionic two part
4.5ml B-ionic Transition Elements
I tested this morning, and my nitrates are at 2ppm (exactly where I want them).
I sometimes add some Aquavitro Fuel for Reefs, but I almost never remember so a big bottle has lasted years in my fridge. I feed about one to two cubes of mysis a day and a pinch of flakes or pellets. used to spot feed the corals reef roids, but ran out a long time ago, so I figure the fish poop is feeding them fine. I also dosed copious amounts of plankton in the past, but I had to clean out the skimmer too often, so I ended that about 6 months ago with no noticeable changes. I do ICP testing about every 6 months and have noticed that I always have to add Vanadium and Manganese, so now I just add a little every few months, but the ICP always asks me to add the same amount anyway. I do water changes when I remember, but average about every 3 weeks and do about 15%.
On a side note, I am convinced that the waving hands and Xenia in my fuge help out. The reason I think this is because of an experiment I have running on my 8gal Nano tank. I have not done a water change in years, and I only test the salinity about every few months (it is usually way high, so I just scoop some water out and let the ATO refill with RODI water till the salinity is near correct). I let Green Hair Algae grow into big clumps and pull it out every once in a while (to act like an algae scrubber). I use this tank to house a fish or two that I am planning to trade, and other frags (like that gorgonia that was stung almost to death in my DT). The amount and health of the hands and Xenia even when water conditions are sub optimal makes me think that they are somehow cleaning the water since the resident Montipora Capricornus and other SPS frags do fine when I have some on the rack. I know this is a weird experiment.