I have a product called tarantula that says it has those bacterial components, have you heard of it, or ever used it? It says it also expands the roots for better absorption. I also have botryprot which is supposed to help with gnats? I live in madrid and have a grow shop, but I'm not sure if they r just making me waste my money and time. The legal stuff is way expensive, it's legal to grow but I feel they give you misleading information at the shops. I have been failing for a year based on what they have told me!!!!
Follow the following advice and i promise a good grow ( as long as your area is dialed in for heat and humidity) start in a solo cup with drainage holes. Use happy frog in the solo cup. Use chlorine free water. Water untill there is run off and dont water again untill fully dry. Dont transplant untill they are root bound. You will know because you will have to water every other day they dry out so fast.
Buy the Roots Organic Master player pack. Organic nutes are mutch more forgiving that sinthetic and using this organic nute you will never have a ph problem. Use there 5 mil feeding scedule. Dont feed for the first time untill they are 3 weeks old ( ingnor there feeding scedule for seedlings and call your first feeding week 1. Feed with every water after that following there scedule. If you veg longer than there scedule repeat the last week of veg untill flip then start there flower feeding scedule. If you flower longer that 8 weeks keep repeating the week 7 feed untill your ready to harvest. No need to flush organic nutes.
You mentioned gnats. If you habe gnats your watering to often. If your pots fully dry you will never have them. If you already have an infestation letting the pots dry between waterings will wipe em out within 2 weeks.
I have started out hundreds of new growers with that advice. The only time i see them and they have a problem every time i find out that they have been using water with chlorine.