With the frag system, I decided to use dosing pumps and a triple dosing reservoir. I sell the products I use myself, after all. Plus, so many hobbyists don't use a calcium reactor these days, so having a common task makes answering questions easier. There are many brands of dosers on the market. I chose to use the independent Icecap Dosing pumps. You can daisy chain them, adding three slave pumps to the master pump. I only needed two and one for this tank. All three pumps are wired to a single power cord, and are placed on a small shelf above their dosing reservoir.
While I enjoyed my small frag tank attached to the 400g reef, after four years it was due to be broken down. I also wanted to set up a bigger system, a stand alone system, that would allow me to grow out frags from my reef's cuttings, and provide a separate repository to hold some species safely in case the big tank ever had a nasty disaster. Plus, with a smaller tank I could do some product testing with normal sized equipment, something I really couldn't do with a 400g setup.
I built the entire thing:
Unlike a traditional frag tank filled with corals to grow out and sell, mine is really a place to putter or enjoy new corals more readily. The tank is arranged with a variety of items, some easy to see, but there are some elusive critters that come out of hiding occasionally.
Suncorals (standard Tubastrea)
Branching Dark Green Tubastrea