You would get more information on google or the clam section on this forum.
In the home aquarium, Crocea Clams require intense lighting to thrive as they contain the symbiotic algae called zooxanthellae, and receive the majority of their nutrition from the light through photosynthesis. Smaller T. crocea that are 2" or less in size are much more sensitive to very intense lighting as their membrane is much thinner than larger specimens. For this reason, care should be taken to properly photo-adapt them to the existing reef aquarium lighting in a similar manner to newly introduced stony and soft corals. When adapting a new Crocea Clam to very intense lighting, it is ideal to set them on a small rock or in a plastic dish with coarse substrate at the bottom of the aquarium. Over time, the clam can then be slowly moved up higher in the aquarium.
Tridacna clams are also filter feeders and constantly filter the water for small particulates. Crocea Clams larger than 2" do not require supplemental feedings, but smaller T. crocea that are less than 2" should be fed a phytoplankton or greenwater supplement several times per week if maintained in a nutrient poor reef aquarium.
Looking for the best food to feed your Tridacna Clams? We recommend AlgaGen Acartia tonsa, AlgaGen Pseudodiaptomus pelagicus, AlgaGen Parvocalanus crassirostris, AlgaGen Tangerine Pod, AlgaGen Moina salina, AlgaGen PhycoPure™ Reef Blend, AlgaGen Decap'd Brine™, and AlgaGen Rotifers.
Tridacna crocea are relatively hardy clams, and require intense lighting and good water flow in the home aquarium. Proper water chemistry is very important, and they will thrive when calcium levels of 380- 450 mg/L, alkalinity level of 8-11 dKH, and magnesium level of 1280-1350 ppm are maintained.