Okay I just read your other post, and I believe his lighting and temps being wrong is the cause of his lack of appetite, rather than the coccidia or the meds... You're using a blacklight??? Okay, #1 get that out of there, no colored bulbs at all, ever. You said you have a Reptisun 10.0
UVB bulb, but is it the compact, regular lightbulb shape or a long 18" or longer flourescent tube? Bearded dragons are desert reptiles and they have very specific lighting and temperature requirements, and if they are not met then the beardie cannot manufacture vitamin D3, which will make it impossible for him to absorb any nutrition, including calcium. So it doesn't matter whether you give him calcium or multivitamin powders, or if he's getting a proper diet or not if he doesn't have the correct
UVB light. And unfortunately there are very few adequate UVB lights out there for beardies, even the ones labeled for bearded dragons. And also, the UVB tube must be unobstructed (depending on what strength tube you get) and must always be mounted within the correct distance from his basking spot or he will not get enough of the
UVB light to matter. So if the Reptisun
UVB light you bought is a compact version it's not adequate and is causing his issues, along with most likely improper temperatures...What size enclosure do you have?
You must buy either a Reptisun or Arcadia brand UVB tube, as no other UVB tube currently on the market is adequate, not Zilla, not All Living Things, not Reptile One, not Reptech. In the US you'll see Reptisun, in Europe and Australia you'll see Arcadia. And unfortunately you'll also need to buy a matching length flourescent tube fixture for the UVB tube, and the fixture must be rated for the strength you buy. It must also always be a 10.0 and NEVER A 5.0, AS 5.0 TUBES ARE MEANT FOR TROPICAL REPTILES THAT DON'T NEED AS STRONG A
UVB LIGHT AS DESERT REPTILES! So in the US you'll need to buy a Reptisun 10.0 UVB tube, most likely either an 18" or a 24", unless you have a very large enclosure that requires a 36" or 48". Forget PetSmart, they don't sell anything but their in-house brand "All Living Things", and they're junk. Petco sells 18" Reptisun 10.0 T8 UVB tubes, and you might have a privately owned pet shop that may sell the better Reptisun 10.0 T5 High-Output UVB tubes and fixtures. The T5 High-Output is better and only needs replaced once a year, and may be mounted on top of a mesh lid (never glass, no UVB penetrates glass at all). The T8 tube CANNOT BE MOUNTED ON TOP OF A MESH LID!!! It blocks up to 50% of the
UVB light. So if you buy a 10.0 T8 tube you'll have to mount it inside the enclosure and under the mesh lid, and within 6-8" of his main basking spot. The T8 MUST BE REPLACED EVERY 6 MONTHS, THE T5 High-Output MUST BE REPLACED ONCE A YEAR. The T5 High-Output must be within 11" of the main basking spot.