My swords have been showing a micro/iron deficiency for a while. I tried upping my micronutrients dose so that iron is dosed 0.5ppm 3x a week (EI)
I haven't seen much improvement and am starting to if it even is iron. The veins are still dark so it could definitely be magnesium. I didn't think it could be magnesium as my GH is quite high (15 degrees/260ppm). Maybe the GH is comprised of mainly calcium and magnesium is lacking.
1. Add magnesium sulfate to my macro bottle
2. Keep increasing micronutrients dosing to get more iron. Copper and other nutrients could get too high though.
Maybe I need to be dosing this at much higher levels because apparently EDTA chelation is unstable at higher pH and hardness so iron will precipitate before absorption.
3. Add iron chelate (EDTA) to my micro bottle to increase iron but not other nutrients.
Which is best? I honestly can't tell if this is an iron or magnesium problem. It seems like I can never get these swords to grow properly lol.
pH: 7.2 with CO2, 7.7 degassed
GH: 15 degrees or 260ppm
Trace mix I am using is from Aquariumplantfooduk.