This is very good reading for carbon dosing in aquarium. Its also give some understanding about how its works and the effect.

Probiotic methodologies are not for everyone, and are not without risks. They generally require careful monitoring of abiotic parameters, and, in the case of some commercial systems at least, can be considered somewhat expensive. However, with a slow and incremental approach, and careful husbandry, these systems are an extremely effective means of controlling dissolved nutrient levels in the marine aquarium.

I completely agree on his conclusion where this method not for everyone and not for every aquarium. More or less do not change the method/path too many times. Pick one and stay with it at least 2 months! and most important do more reading. Below shown the table for commercial probiotic product, all the solid polymer producer does not come with any bacteria source. So for a starter it recommended to add bacteria source to boost bacteria population.


image from coralmagazine-us.com

The complete article about this can be refer in here...