I have a 90g and have never used a reactor but I am considering it?
Kinda why I asked.
Currently I dose manually with seachem, but I have followed the balling method, and have used various chems and dosing regiments. My experience is that the dosing pumps (which i used for over two years) also need regular maintenance such as pump tube replacements, adjustments, and those tubes clog regularly...for me it was high maintanance that why I gave them up for manual dosing daily.
But back to your original question, fauna Marin website has great information on dosing, or just search for the "balling method" here on canreef.
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http://static.faunamarin.de/manuals/...ethode_eng.pdf