Hello,
If you have no consumption of Magnesium you can mix your own Component 1+2+3+ without Magnesium but in well running aquarium it should be Magnesium consumption.
If Magnesium consumption is low you can dose Component 1+2+3+ equally in small amount to keep Magnesium stable and add more Calcium or KH as you can read on our website:
Dosage: needs to be adjusted according to the consumption of macro-nutrients, and based on critical water parameters like Calcium, Magnesium and KH. If one or two parameters are still not balanced- we recommend to continue with administering equal doses of each component, and take advantage of one of our additives (Calcium, Magnesium, KH Buffer) to restore desired level(s).
Please look at Component 1+2+3+ recipe in our guide, page 14:
https://aquaforest.eu/wp-content/upl...B_02.01.19.pdf