Waste--Ammonia/Nitrates or Phosphates?
I am trying to tweak my EI dosing to deal with some persistent algae issues on a recently set up tank (last couple months) and am looking for some general knowledge to assist in determining the direction of the tweak. For the time being, I'd rather try and figure it out on my own than start another, "Here's my tank parameters, what the heck is going on?!!?!?" thread--but that may be coming in the future.
We know leftover food, rotting plant matter, and solid/metabolic waste from the fish all contribute to the fertilizing compounds that we add to the water to help plants grow, but in reading these and other forums it is hard to determine which contributes to what. Animal metabolism makes ammonia, but what about the others? I have read that overfeeding can cause excess phosphates and the same for the rotting plant matter, but wouldn't those also increase Nitrogen compounds as well? Are there any chemists or experienced folks out there who can roughly quantify (very roughly) what comes from where in terms of the flora and fauna in our tanks and their respective decomposing wastes?
Hopefully that is a somewhat clear and legitimate question. If not, please ask and I'll try to clarify exaclty what I am looking for. As always, thanks for the past and future help!