Each type of carbon dosing encourages different bacteria to multiply. I feel that VC works better than other carbon dosing for several reasons:
-you cannot overdose. As long as you ramp up the dosage slowly & use a skimmer to remove the excess waste, you can dose as high as 100ppm without harm to your inhabitants.
-Unlike other carbon dosing products, VC has been thought to help boost collagen in cells. This means, healthier corals & fish, better growth & color.
I find it extremely easy to dump in a tsp every morning & evening into my sump.
The VC I use (sodium ascorbate) has a pH of 7.1. That's pretty close to neutral.