Shagrathanswered grow question 4 years ago Hi!
I'd say use both of them! They both have different usage. Hydroguard is beneficial bacterial product and it is really good to make healthy and living medium while preventing harmfull pathogens while ryzofuel is kelp product used to enhance the roots and shorten the internodal spacing to create shorter and bushier plants. Also it helps during flowering stretch and you will get more budsites and denser buds!