I'm looking at the ingredients in Flourish comp...
...and wondering if I really need to pay for most of the stuff in the bottle?
N, P, K I dose via dry chemicals. Ca and Mg...my tap water is liquid rock. Then there's a bunch of metals. Are any of these gonna be limiting besides maybe iron? Seems like there should be enough of stuff like copper in my tap water. The only thing I'm wondering about is sulfur...is there a reason there's so much of it?
So I'm wondering if I can just use an iron or iron/potassium supplement, which would allow me to add greater quantities of iron and hopefully be cheaper.
The tank in question is "medium" tech, 2 wpg excel only.