Since I work with bugs (microbes, viruses etc.), my botany is rudimantery. However, if I have to take this hobby seriously, I have to read about plant physiology which I will in due course of time. Nonetheless, great discussion. Please tell me more about fertilizer dosing as you mentioned above. I have a 10 gallon tank stocked with Java fern, Java fern lace, Rotala rotundifolia, Ludwigia repens, Pearlgrass, and some dwarf hairgrass. Since I admire plants more than fish, I have only 3 Neon tetras and 3 ghost shrimps.