Since I don’t have access to the product by Impello here, I’ve got the listed bacterial strains in a powder format at 5 billion cfu/gram.
The powder is water soluble and I was thinking I’d just add all 3 strains to water and then add some potassium sorbate/sodium benzoate to inhibit mold.
I know that previously when I have used powderized bacteria they stabilized it with a bit of dextrose and a small amount of dendritic salt to prevent clumping.
We would mix the powder daily with water and ‘bloom’ it with an airstone for about an hour.
This was for an aquatic application though, so it may be unnecessary if you have aeration in your nute water.