<a href=showthread.php?s=&postid=15714426#post15714426 target=_blank>Originally posted</a> by GlassReef
Thank you!
Rather than trying to reinvent the wheel, if you don't mind, I'll just answer your question with some things I wrote a while ago:
As for my system, here are the formulas I use:
Alk - 4 cups (32oz) sodium hydrogen carbonate in 2gals RO/DI water.
Ca - 4 cups (32oz) calcium chloride dihydrate in 2gals RO/DI water.
Mg - 1.6 cups (12.8oz) magnesium chloride hexahydrate and 1 cup (8oz) magnesium sulfate heptahydrate in 2gals RO/DI water.
I started dosing at a rate of .4mL per gallon of EACH solution per day. As my frag and fuge tanks are not yet on-line that means .4 X 330gals = 132mL of each solution per day.
Right now each of my three dosers is on for 10 minutes at a time 8 times a day. One quickly gets to the point where their params are totally stable.
It's not a good idea to dose the supplements simultaneously (especially Ca and Alk) due to the probability of precipitation, so I set the timer's up in a staggered fashion. Each supplement is set up to be dosed 8 times a day for 10 minutes. That makes 80 minutes X 1.6mL = 128mL - very close to the 130mL I was shooting for.
The Alk is dosed at 12:00, 03:00, 06:00, 09:00 - both A.M. and P.M.
The Ca is dosed at 01:00, 0400, 07:00, 10:00 - both A.M. and P.M.
The Alk is dosed at 02:00, 05:00, 08:00, 11:00 - both A.M. and P.M.
You can see that the doses are staggered one hour apart and no two supplements are dosed at one time.