Aquatic Plant Forum banner
1 - 2 of 2 Posts

·
Registered
Joined
·
357 Posts
Short answer: Niko's calc + Fertilator

Long answer:
Starting with Mg portion of target:
Ca ppm = 4 x Mg ppm
(2.497 x Ca ppm) + (4.119 x Mg ppm) = GH ppm
9.988 Mg ppm + 4.119 Mg ppm = 17.9 ppm
Target Mg ppm = 1.27
Target Ca ppm = 5.08

MgSO4+7H20 dose (note: using 55gal, but you should substract 15-20% for displacement if you are anal):
Target Mg ppm x 3.77L/gal x (mg MgSO4+7H2O4)/mg Mg x Tank gal = MgSO4 mg dose
1.27mg Mg/L x 3.77L/gal x (10.1mg MgSO4+7H2O4)/mg Mg x 55gal = 2660mg MgSO4 =~ 2.7g MgSO4

CaCl2 dose:
Target Ca ppm x 3.77L/gal x mg CaCl2/mg Ca x Tank gal = CaCl2 mg dose
5.08mg Ca/L x 3.77L/gal x 2.77mg CaCl2/mg Ca x 55gal = 2917mg CaCl2 = ~ 2.9g CaCl2
 

·
Registered
Joined
·
357 Posts
Salt,
If you are actually trying to figure out my mess, (2.497 x Ca ppm) + (4.119 x Mg ppm) = GH ppm comes from a bookmark and I checked the numbers against linked calcs before posting. I am beginning to understand why you are correct from your post and the krib archive but need to try again later. Appreciate explanation.
 
1 - 2 of 2 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top