Day 2 - Fertilizers
So I spent a lot of time re-learning some of what I have forgotten about planted tank fertilizers. I re-researched EI and PPS and took a casual look at PMDD and ADA methods. Last time I ran EI with good success, but this time PPS seems to be calling me.
In reality I'm planing to bastardize both methods and do something that makes sense to me. PPS classic has a component of testing regularly and establish trends; whereas EI teaches that over-fertilization isn't a bad thing. My plan is to measure what I can, over fert what I can't, and read the plant leaves to show me if I have a problem.
So, I can measure N, C, P, Ca, GH, Fe, and (I'm told) can calculate Mg level. What I can't measure is K, S and other trace elements. For the first few weeks, I'm going to focus on N, P, K, C and ignore the rest of the elements. For aquatic life, I only have ghost shrimp, amano shrimp, and assassin snails so the TDS from them should be effectively computed in as part of the baseline.
I've created a fertilizer journal: (Live readonly link)
I plan to record what I put into the tank, and measure N & P and TDS. I'll only be dosing with KNO3 and KH2PO4 at first. My thought is if I know the TDS changes and I can measure N & P ppm then K is the only unknown in the tank.