Healthy Herp is a relatively new company (they came out in 2000), they do have a website, but it is under some severe stages of construction; you can find it at www.healthyherp.com; to get further, more detailed info you can contact them directly at healthyherp@consultant.com . I don't have a container of supplement here with me at the moment, or I would give you an exact list of ingredients, but I can tell you that compared to the supplement you are using right now, the Healthy Herp one has about 25-30% more digestable (usable) calcium content. So far, I've had nothing but great luck with them, and as an added bonus, every once in a while, they have been known to give free samples. As far as the supplement that you are using, I would be dusting your feeders at every meal and dust them moderately to heavily. Regarding the UV light, as a general rule it is understood that leos don't need UV since they are nocturnal, but my experiences have shown that they do much better with a low-level UV source; it provides them with a defined photoperiod (which will be especially helpful if you are planning on breeding), as well as, aides them in utilizing Vitamin D, and thus, calcium. I've had my geckos on and off the UV light, and by far, I get better results on color, feeding, size, and activity levels when they have the UV, so they now have it on year-round. Now, there are some exceptions to general UV usage, especially pertaining to leucistics and albinos, providing you have a true leucistic. As a general rule, these two morphs can be prone to UV burn due to the lack of pigment in their skin. To prevent this, if you get a UV fixture, leave the plastic cover on over the lamp, this will still give them some UV benefits but will elimate the risk of burns. Also, make sure they have caves to hide in, as they don't always need the direct (basking) benefits of the UV. Regarding the note about if you have a true leucistic, looking at the picture, I am questioning that; the true leucistics that I have seen have no iris color (ie. all black eyes, looks like yours has silver/bronze irises), as well as no dark pigment (yours appears to have some dark undertones). I can't be positive, but I am wondering if perhaps you just have a patternless male? If this is the case, disregard all that was said about the UV sensitivity and remove the plastic cover. Also, the low temps could contribute to the lack of breeding, as well as, the lack of calcium absorbtion. A leo's core temp needs to be at least 88F for proper digestion, and if it is too low, then they are not completely digesting their food, thus they are not able to adequately utilize the vitamins and minerals that are in the food and supplement. Good Luck!