I cannot recommend the effectiveness of other products such as tetra safe start, as I've never used them personally.
However, you can very much so seed your filter media with bio media used in another aquarium to help jump start the bacterial growth.
Green Bacter is a food source for the various bacteria in the substrate, bio media, etc and helps spurn their growth. Think of it as supplying nutrients to plants: Green Bacter is giving nutrients to bacteria so they grow. The same laws of minimums apply (e.g. a plant can only grow to the capacity which the lowest nutrient is supplied)