I tried to simulate my SPS tank towards the Berlin system, and tried to use as little additives as possible.
I had a system crash back in the July of 2013, due to a power outage. I kept the live rocks from that old tank.
Rinsed thoroughly with tap water and used the remaining as my base rock. Taiwan is an island surrounded by ocean.
Most of the populated cities has natural sea water delivery service providers to choose from.
I also use NSW services and the water is taken from the more pristine sea water from the north east coast of Taiwan.
I have a 2500 liter natural sea water storage tank on my roof. Of which, 500 liters are used for monthly water change,
and the rest of the approx. 2000 liters are used up as replacement for the wet skimmate.
I have a DIY auto-replenishment system that pumps in the NSW, so far there are no significant changes to my water level.
There are also RO replenishment made several times a day for the evaporated volume.
The combination of the above enable the system to maintain at 1.026 specific gravity at all times,
and I seldom see any fluctuations. I will make minor adjustments at the beginning of the summer and winter seasons.
Besides, maintaining stable temperature and relative humidity in the fish room also helps.
The SPS tank is sensitive to the nutrient level controls. So to minimize this variable as much as possible,
I have plans to keep this tank fishless in the first 2 years, despite the fact that I really do like to have fish in the tank.
I did use ROWAPHOS to deal with the high PO4 at the start-up of this tank.
Other than that, I did not use any medication, bacterium, or carbon sources (Vodka, sugar, vinegars...etc).
I have a relatively large sump compared to the main tank. Other than the various in-sump equipment necessary to
maintain the system, there are also chaeto mats, connected RDBS, and a simple ATS tank.
I think that in combination to the fishless state is one of the main reasons for the NO3 being undetectable.
Currently ROWAPHOS is no longer being used, as it is maintaining between 0.03~0.08ppm (Hanna).
I want to use natural husbandry to keep lowering it, unless it rised above 0.1ppm.
I use calcium reactor to keep KH at 8-9dKH. Although the ca reactor is not very user friendly and tweaking it require finesse,
but using a pH solenoid and a timer to help it purge excess CO2 periodically,
I only need to re-adjust the Ca reactor every 2-3 weeks.
Being in the tropics and with strong lightings, keeping the water temperature at constant
26 celcius has taken a toll on my electricity bills.
For mechanical filtration, I use 2 sets of 75 micron and 2 sets of 10 micron (7 inches) fiter bags,
and rinse it every 2 days and 2 weeks respectfully. Using fine filter bags helps to keep my water clear.
In the past 6 months, I have collected some of my favorite species of SPS.
With a good beginning, I wish I can keep it going.
I really do appreciate my buddy Jimmy & Joe to help translate my thoughts,
and giving me a chance to share my passion with hobbyist internationally.