First Grow dwc

It all depends on how big you like your plant as you could top at the 3rd node. I’m waiting for my 4th node, I’m currently doing an auto. But ever growers different as some do it on 5th or 6th node etc.

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!

Personally I use coco and do nutes, plain phd water, nutes, plain phd water and so on it helps to prevent nute build up