There also is another over looked wrinkle in the clam lighting guide.
What happens in the wild does not happen in the clam farms.
Clams grown in raceways never experience what their parents did out on the reef.
Most farmed clams are grown under the same light exposures and water conditions regardless of species.
At the clam farm, does a Derasa clam growing next to a Maxima clam under identical conditions for over a year...some how require in once its shipped and placed into an aquarium, a different (in tank) conditions simply because its a different species?
Considering that all Derasas are farm raised , do we really even need to consider what conditions wild Derasas like ?
These farm raised clams seem to domesticate all the species into one set of growing standards.
Perhaps we need to list growing conditions for this new hobby species: "Tridacna Domesticus Racewayicus"
Jeff CBA