I keep tellin ya about the profilux man

.......SA2 for me (mag is not added nearly as often as Ca and DKH so I did that manually).....but ya.....once you roughly know where your at, its pretty much set and forget.....and really easy to change dosing increments too......or you could do a Ca reactor...Ive never used one personally so I cant speak from experience as to how they are for adjusting and general maintenance and stuff....not as easy to hide and store reactor/Co2 bottle combo as a cable box sized dosing unit and a couple gallon reservoirs tho
oh and BTW sweet tank man.....that gonna be pure mayhem when it grows up......
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260g mixed reef, 105g sump, water blaster 7000 return, Bubble King SM 300 skimmer, Aqua Controller Jr, 4 radions, 3 Tunze 6055s,1 tunze 6065, 2 Vortech MP40s, Vortech MP20, Tunze ATO, GHL SA2 doser, 2 TLF reactors (1 carbon, 1 rowa).
http://www.canreef.com/vbulletin/showthread.php?t=50034 . Tank Video here
http://www.vimeo.com/2304609 and here
http://www.vimeo.com/16591694