Basic question. How often should I dose Iron? I should mention I have no way to test my Iron levels other than looking at yellowing leaves and not red ludwigia. Setup: 30 gallon tank with a UG filter with a 60 gallon air pump, aqueon 20 quiet flow. Oceanic light(and tank) 6500k bulb 24in, 3 LED lights (unsure of temp), and a 2700k CFL. Standard 12 on/12 off. Dosing with Flourish Comprehensive and Excel. Plants: Purple Cabomba, Java Moss, Wisteria, Guppy Grass, Temple, Anubias, Red Ludwigia Fish: German Blue Ram pair, 3 ember tetra, 3 cardinal tetra, 4 neon tetra, ramshown & bladder snails. My Temple has holes and yellowing leaves and the Red Ludwigia (I just got it yesterday) is red under the leaves, but not on top. I've hit the tank with about 4ml of Iron since last night. Also just picked up yesterday. Thoughts/Advice? Thanks in advance.