Could you tell us the brand and the calcium content from the label. It really depends on how much calcium is in the fluid and what kind of calcium it is. Also, how old is your dragon? Growing dragons eat more than adult dragons, but the ratio tends to go along with the amount of bugs they eat. A juvie eating bugs every day should get one feeding dusted every day, an adult eating bugs three times a week gets a daily feeding dusted three times a week. Most of us use powder because its main purpose is to offset the calcium to phosphorus ratio in live feeders that are very high in phosphorus. Adding calcium to greens that already have a high Ca ratio isn't necessary unless you are nursing a rescue or gravid female. I'm worried a spray won't have enough calcium for supplementing with live feeders. Even still, excess calcium doesn't usually pose a major problem unless D3 levels are high enough to cause excess absorbtion. It's all about reaching a good balance with a variety of foods. I would recommend getting a powder, with or without D3, depending on the type of UVB light you have. I think you will find it easier and more convenient to use as needed, while the sprays and liquids are a better idea for a multi or b complex vitamin.
Zilla Calcium Supplement food spray.
It says the guaranteed analysis: calcium(min)....1700ppm
Ingredients are: water, calcium gluconate, calcium carbonate, calcium chloride, potassium sorbate, sodium benzoate, and Xanthan gum.
I don't dust my crickets. I dust the greens and alternate days between the multivitamins and calcium. I have been using calcium powder.
My beardie, Ra is a year and a half. I feed him 4-5 crickets daily.