goin nuts, please help (fert q)
My bags of dry ferts display different chemical compounds than what I can find on here or anywhere when trying to figure out the proper amount to dose my 35. Looking this up on past threads I came across this quote by Shalu:
Originally Posted by shalu
To use an analogy, on fertilizor bags, you see numbers for P2O5 and K2O are listed, but that does not mean the actual product has those ingredients at all, more likely they are in the form of PO4 and K+. Those number are given for the equivalent P and K contained in it.
Would someone be able to explain this to me, or just confirm that this is true? My Nitrates come from Nitrate of Soda (N), Superphosphate (P2O5), and Muriate of Potash (K2O).
I am asking this because I was reading the dosing threads to learn how much dry ferts to dose in my tank. I was up all night trying to figure out calculations for the chemical compounds in my ferts thinking they were different (P2O5 instead of P2O4 etc), but then I found this thread.
Below are the specifics for my ferts. I have no problem doing math on my own, I just need a little help. Particularly alarming is the guaranteed analysis on the nitrate of soda. 16% nitrate, but the thing is derived from nitrate of soda.....soda meaning calcium carbonate.....580 lbs per ton....
My ferts are N= Nitrate of soda...16-0-0
total nitrogen (N) = 16%
16% nitrate nitrogen
derived from: nitrate of soda
potential basicity - 580 lbs calcium carbonate per ton.
Available Phosphat (P2O5) = 18%
Derived from : superphosphate
Muriat of Potash which is not the KCl as calculated in this thread already
Soluble Potash (K2)) = 60%
Derived from: muriat of Potash
Also I read that dosing Fe is a "luxury not a necessity". Knowing this after I bought some liquid iron, I didn't dose my tank yet. It does, however, contain some trace minerals as well: Sulfur, Copper, Manganese, and Zinc. I thought copper was bad bad bad news for fish though this contains .125% water soluble copper. If not, is this a cheap replacement for LFS micros?