I recently purchased the rep-cal calcium was wondering if it was better than their repti calcium from zoo med. On the bottle of the zoo med supplement it says that it is pure calcium and leadfree. it also says that the lead in the oyster shell calcium is harmful to reptiles.the rep-cal calcium says that it is phosphorus free and it has more vitamin D3 unit then the other one does. I'm wondering which one is better for my whites tree frog because I'm having trouble with Misty my newest where she's pooping white urates. I took her to the vet to be seen and having her poop sent out and tested for any possible ailments. I recently got her from a petco near by work. She's been in a qt tank for the last two weeks. Does anyone have any opinion of calcium supplement vs the other?