here are some more information :
I stopped dosing trace mix since 1 weeks but here are 3 insoluble salts :
solubility chart :
https://en.wikipedia.org/wiki/Solubility_chart
FePO4
https://en.wikipedia.org/wiki/Iron(III)_phosphate
MgPO4
https://en.wikipedia.org/wiki/Magnesium_phosphate
CaPO4
https://en.wikipedia.org/wiki/Calcium_phosphate
I'll take the bubles and checked if there is Fe or Mg or Ca
and it will tell me if it's one of these salt
I stopped dosing trace mix since 1 weeks but here are 3 insoluble salts :
solubility chart :
https://en.wikipedia.org/wiki/Solubility_chart
FePO4
https://en.wikipedia.org/wiki/Iron(III)_phosphate
MgPO4
https://en.wikipedia.org/wiki/Magnesium_phosphate
CaPO4
https://en.wikipedia.org/wiki/Calcium_phosphate
I'll take the bubles and checked if there is Fe or Mg or Ca
and it will tell me if it's one of these salt