I made up a demo batch of PMDD last night using 1/4 ts trace mix and 1/4 ts
of iron chelate to 100ml or water but when I added it to my 150l(40G)
aquarium today I used up half the bottle (50ml) getting the iron from
..015ppm towards .1ppm. Is this normal or does it take a while for the iron
to break down to get a reading. If so have I overdosed or what. Previously
I was using flourish dosing nearly thrice what was recommended for a lightly
planted tank. I'm using an UGF at half capacity, and an eheim 2213 with
little surface agitation/oxygenisation. Ta.