All I have is a SA2.... Very easy to adjust

.....I needed very little MG so I couldnt justify the extra cost to dose that little bit of Mg.....in hindsight(and I know I can add a pump if I wanna) the third(or fourth) can be used to drip a steady stream of phyto or how bout this.....us Zeoheads could come up with a solution containing all the Zeo foods(Extra CV SP AA and CS).....and dose that 24 times a day

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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