Yeah @shawnybizzle please don't provide further proof of our existing stereotype of young ignorant brit thug wawannabe. Go loose your virginity, you're way too frustrated.
One would have to run used nutrients through a LC/MS to compare results to those from the original mix.
I suspect a variance in uptake of different elements depending on strain, age, stage of growth and environmental conditions.
Not feeling it, the outside unit blasts heat. It MIGHT do 3kW installed properly but I don't see it doing 4kW. I would want an 18kbtu probably, but those are going to be 240v imo.
Water from your ethanol is what's making the milk due to the oil mix. I let mine evap, there's oil suspended in that water.
Never evaporated on ptfe... just pyrex or stainless.