Quote:
Originally Posted by Delphinus
I voted 3-part but IMO realistically 2-part and 3-part are the same thing. Big 3 being Ca, Alk and Mg .. you don't really have to dose Mg on a daily basis (or if you do it's some tiny amount compared to the other two). If you dose 2-part with something like Seachem "Reef Builder" and "Reef Advantage" (I forget which one is Ca and which one is Alk but that's what they are together), then you are already dosing Mg anyhow. If you use the Randy Holmes-Farley recipes then you have to dose Mg separately.
I dunno, Ca reactors still have their place but you said it yourself, you can't beat the simplicity of 2-part. (No CO2, no "dialing it in", no fussy regulators, etc.)
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Mag should be dosed at approximately the same rate per week that alk & ca are dosed per day.
I dose about 1 liter of each ca & alk per day. I use Randy's 2 part recipe which as you mentioned is actually 3 part but it's just called two part. I also use recipe #2 because my ph is high enough already I don't need to turn the baking soda or sodium bicarbonate to "soda ash or sodium carbonate". I quite like it but can't honestly compare since I have never owned a ca reactor.
(I voted 2 part)