ReptiWorms and Phoenix Worms can be fed as staples feeders. CalciWorms cannot. The reason being is their nutritional content varies based on their diets.
A few of you here are saying that ReptiWorms cannot be used as a staple feeder or are confused whether or not they can be, when in actuality, they can. Here is the nutritional analysis of ReptiWorms:
http://www.reptiworms.com/info.php?articles&articles_id=6&sid=7t4q9jbsqll97vpsn3jojtc686. Note that everything is ship-shape, and that the calcium-to-phosphorous ratio is within optimal range (0.43:0.30, in terms of percent; that's roughly 4300:3000, in terms of ppm), which is an approximately 1.43 ratio. The optimal calcium-to-phosphorous ratio for bearded dragons is somewhere between 1 and 2. The calcium is
not too high.
Here is the nutritional analysis of Phoenix Worms:
http://www.phoenixworm.com/servlet/the-template/comparison/Page. Note that everything is fine as a staple, and that the calcium-to-phosphorous ratio is also within optimal range (8155:5355, in terms of ppm), which is an approximately 1.52 ratio. Again, perfectly fine in range. If anything, the calcium-to-phosphorous ratio (and ppm) of Phoenix Worms is
higher than ReptiWorms, so I'm not sure where you guys are getting the information that ReptiWorms have too much calcium to be used as a staple.
Here is the nutritional analysis of CalciWorms:
http://www.timberlinefisheries.com/products/feeder-insects/calciworms/. The calcium-to-phosphorous ratio is 3.28, which is higher than the optimal range. Hence, why they cannot be used as feeders, but are fine as supplementation (which they perfectly state on their site).
For those of you who want to know more about the calcium-to-phosphorous ratio: the two nutrients are essentially linked in terms of metabolism. Calcium can only be absorbed with a relatively equivalent amount of phosphorous and vice-versa (it's actually more complicated than this since the body will attempt to absorb calcium or phosphorous by degrading its own stored calcium or phosphorous to compensate for the difference, but this is the main point). If the ratio is skewed heavily (with the optimum being between a 1:1 and 2:1 ratio), then health problems can occur over time (e.g., bone disorders if there is the ratio is skewed heavily in favor of phosphorous or calcification of organs if the ratio is skewed heavily in favor of calcium).
I hope that this clears up some things for you, as well as encourages you to continue asking questions and doing research.