well, dt's is the best source of live phyto supplement and its never a bad idea to have a diverse diet..However that doesn't mean you should give your tank a phyto feeding frenzy.
Be carefull, don't missuse and abuse this dietery supplement..or it could do more harm than good...
The main organisms(pods) that eat phyto are at the lowest of the food pyramid in the ocean.
-phytoplankton (micro-algea) gets eaten by zooplankton(pods), zooplankton gets eaten by fish and some inverts. After that Fish poops and corals feed on the fish waste, which has planktonic cells and are nutricious fatty acids that fertilize the whole reef comunity.. Its a phase induced process.
Its the case of Inporting and exporting... It all depends in how much phyto your system can utilize(get rid of) without leftovers accumulating/decomposing in your aquarium..
When the phytoplankton experiences a population explosion because of an excess of nutrients and other factors, these tiny plants produce algae blooms. Blooms can result in the loss of aquatic life because they can reduce the amount of oxygen in the water and they prevent sunlight from reaching corals..
This is when u start 2 have sewage-like green water= phyto bloom..
It is a essential food source for zooplankton(pods)..and other organisms that may benefit from it, However the amount of organisms that have no use for it is also vast.
To my knowledge, theres no scientific determination whether sps/lps/soft corals utilize much of phyto...
A recent study showed that soft corals have higher levels of phyto in their guts, than what it was available in water column..why???
maybe cause once they ingest it in their guts, they have trouble digesting it..(wether it was intentionally or accidently ingested).
Or maybe they do utilize it so much and so often that it takes a long time in their guts..(making it look like it has trouble digesting it).
either way, the phyto concentration is much higher in the coral's guts than it is in the water column that surrounds them.. why?
Could that be accumulation?
whatever it is, thats excess nutrients that lack exportation...(aka chemical imbalance)
Phyto are single celled organisms, which as soon as they hit the multicellular stage can become biotoxins.
FYI; 1 million cells per liter of tank water= a bloom.. this blooms are have deleterious effects on your ecosystem.
keep in mind that most reef animals (about 90%) with a photosynthetic symbionts have evolved to withstand and thrive under nutrient-poor tropical
waters..thus IMO theres no requirement for supplementing phyto.(unless the zoo population demands more)
making them somewhat self-sufficient, since they feed mostly via zooxanthellae.
Intentional feeding and photo output are linked. Corals in enclosed systems like our tanks have shown dissolved organic uptake to be at a maximum, when corals are starved(not fed).
Unused inorganics/organics in water column will degrade water chemistry...
which is the main culprid of some tank crashes.
I don't even supplement phyto, But i do get decent amounts when i scrape tank glass.
And my pod population is so high, it makes illegal immigration look like a cycling process....that not even the INS can endure..