Dosing, Sources for PMDD , a practical companion by Tim Mullins Early comments on this paper. Later information . General Discussions on nitrate vs. ammonia uptake rates for various plants, A chart showing symptoms of nutrient deficiencies . Neil Frank's draft on dosing and concentration . Roger Miller experiments with composting his aquatic plants and using them as fish food.
Water changes to replenish natural trace elements.
An introduction to substrate by Karen Randall Steve Pushak has a big hyper-treatise on substrates on his site . Dr. Dave's take on the function of roots, anaerobic substrates, and the like. Some high-content discussions from APD specifically on laterite . Their website is gone, though. Someday I will organize the usenet fertilizer discussions into a coherent set.