yet another addition to my ever growing reptile collection!

Sorry Manda, I was at work when I answered that, lol. Just did a little research before actually venturing my opinion. Calcium citrate contains roughly half the amount of available calcium by weight as calcium carbonate. And it is actually a salt, so I wouldn't compare measurements by volume, just by weight. i.e. 1 teaspoon of calcium citrate is not comparable to the equal amount ofcalcium carbonate, but 1 gram of each would be easier to compare accurately, 1 gram of calcium citrate has half the available calcium of 1 gram of calcium carbonate.)

That liquid calcium glubionate is the best stuff going. The recommended dosage is 0.1ml/cc pet 100 grams of body weight. So if the little guy its 20 grams, that would be .02ml, or 2 units on a feeding/dosage syringe, or a u100 insulin syringe.
Just my two cents, but I would do that once, then half that dose daily for a bit. And make sure he stays hydrated. There is definitely such a thingas too much calcium, and if that dies happen, and they can't flush it out, you can end up with calcification of the kidneys and other organs.