Quarantine for new fish: After a few newbie hard lessons in the beginning, I set up a QT for new fish. Initially, this tank was connected as a refugium to my sump, and then disconnected when in use as a QT. I use the hyposalinity routine, and have had great success with acclimating new fish including some more finicky Butterfly fish such as Copperbands and Pearlscales. The entire QT process usually takes 2 or 3 months for me. Here is a good article on the benefits of hypo.
http://www.advancedaquarist.com/2007/6/fish
Corals: I dip all new frags in either Revive or RPS. In some cases I also QT them for at least a week or two. This gives me a chance to ensure no eggs are transferred, and do more than one dip. And with RPS, it is necessary to QT with a carbon bag in your tank to absorb any remaining dip from the coral. I also break off the frag from the plug, except in a few cases where that may not be practical. Again, that is where the QT is important in case there are some eggs on the plug or rock/rubble.
Water changes: I do a 20% change every 3 weeks on average. I use Instant Ocean most of the time, but have used more expensive brands in the past. I do have a few buckets of Salinity sitting in my storage room that I may start using soon. I use a DIY ATO connected directly to my RO/DI output to keep my sump level constant.
Dosing: I auto dose Seachem Reef Buffer (for alk) and Seachem Calcium Advantage. I manually dose Magnesium as needed (only had to do it once so far). I manually dose Brightwell MB7 every 2 or 3 days, which prevents cyano outbreaks.
Bio pellets: I run a UF20 Vertex reactor using Vertex pro-bio pellets. That worked great and brought down my nitrates from a high of 100 ppm to zero. Once the nitrates were zero, the consumption of the bio pellets also really slowed, and have not had to add bio pellets for almost a full year now.
GFO and Carbon: I run these in my own DIY reactor as described earlier in this journal. I change GFO about every 2 months, and carbon every 4 months. I do stir them up at least once every month though. My phosphate testing tells me when the GFO has run out.
Testing: I use API for Ca, KH, and nitrates. I use Salifert for Mg, and a digital Hanna Checker for phosphates. Ca and dKH are tested every 2 - 4 days, and I adjust my auto doser (Apex controller) if necessary. Phosphates are tested about once a week, although less often when they are near zero. Tank salinity is tested after every water change with a refractometer.
Additives: Sponge Power. Some Kent products, incl Trace Elements, Phytoplankton, Coral Accent and Coral Vite. And occasionally some Purple Up.
Temperature: I run a chiller and a heater to keep my temps between 77.6 and 78.8.
Cleaning: Tank sides about every 3 or 4 days. I use a toothbrush and turkey baster on my rocks as required. Lately have been doing that about once a week in a few spots on my upstairs tank due to a little algae outbreak.
Skimmer: I have a Vertex In-280 and the neck and container need to be cleaned every 4 or 5 days. I have never cleaned the pump or bottom part of the skimmer (in use for almost 3 years now). It is powered by my Apex controller, which includes a delayed start up of 5 min after a power outage to prevent overflowing because of a high water level in the sump.
Feeding: I feed 3 or 4 times a day, if I am around. Pellets (2 kinds) and freeze dried mysis are the staples, with occasional treats of frozen PE Mysis and Pacifica Plankton. Also some nori sometimes for my Yellow Tang and Foxface. If I am away for a few days (very frequent in the summer), I don't feed my fish. If I am away for a week or more (about 3 or 4 times a year), I will set up my auto feeder to dispense a small amount of pellets in my upstairs tank. The bottom tank fish don't get anything. So far, the fish have all been happy (but hungry) when I returned. I don't trust anyone else to feed them (incl family). The longest stretch so far without food has been 3 weeks, and the fish were all fine. The Butterfly fish were a little thinner, but they soon fattened up again. And the Foxface was a real pig for food for a while.
Remote monitoring: I have my Apex set up on the internet to view and adjust parameters (incl dosing). I also have a Foscam IP camera set up on the internet to keep an eye on my fish when I am gone.
Logging: I keep a manual log of all my tank activities incl testing parameters, changes, and anything to do with the corals and fish.