I apply this set from TMWell I use the dsr method, I just checked what a 5 liter jerrycan costed which is 25 euro’s. Calcium includes (strontium) is 17 euro’s per liter same for magnesium which include (potasium boron iodine manganese) elements.
reffering to the EZ- line of products of dsr. its also possible juts to add a single ellement
https://www.dreamcorals.eu/nl/dry-products-dsr.html
I also wanted to ask if you use such a filler in a calcium reactor, will it work?