Ok, so this is a second and only partially related question to the first since I was thinking of ordering green leaf aquariums's green fert pack. Plantex CSM + B contains 0.1% of copper, do I need to worry about that amount of copper in my shrimp tank if I dose every other day? or should I get the Miller Microplex for the invert tank?
Also is there a way of dosing iron? I dose 2.5 ml of Flourish Iron every day in my 29g tank and still when I test for iron the result is 0 in the water. My plants are like Seymour when it comes to iron.
Addition: nm I found the iron chelate