There are a lot of topics that you bring up here, , that I have wondered about for sometime.kimoyo said:The coral colors you see are a defensive measure. The corals fluoresce/reflect light that is harmful or unused by the zoox. The coral only needs a certain amount of photosynthesis and will limit the light the zoox receive or expel them when getting to much. The zoox enable the coral to make amino acids by providing it with a photosynthate. After the zoox are limited the coral still needs to get amino acids from somewhere or they "starve". To prevent this I'll dose AA's directly, unlike the indirect way of feeding fish. Basically its changing the way they eat to improve colors. Don't know if I will be successful but I would like to try.
My questions on this paragraph, (to which I have my own thoughts) that I would like to know answers to are:
1. Some SPS can generate all their amino acid requirements from photosynthesis, so I am assuming your talking about the species that cannot do this, . Yes?
2. When and under what conditions would the zoox becomes limited? and once this occurs the idea of coral starvation needs to be better defined. Since slow growth or stagnation is another possiblity, but I am sure is an occurrence that we only observe in corals that are not in the wild. Therefore the idea of coral starvation is not a "normal" biological occurrence for corals.
3. What amino acids are being dosed and in what concentration? To know this is very important, i.e. essential vs. non-essential, L vs. D form.
4. What direct uptake systems do SPS corals have to sequester amino acids directly? I would think that algae and bacteria would be much more efficient in amino acid uptake mechanisms, i.e. so how does dosing to the whole tank ensure that the corals get the "goodies"?
5. If bacteria use up the dosed amino acids, which is a very real possibility, then from their subsequent growth spurt how do you know that you are just not creating another molecule to become limiting in the tank due to this utilization of nutrients, i.e. iron for example. Thus preventing "bad" algae to grow and additionally providing food for the SPS in the form of bacterioplankton.