First Time DWC Hydro Blue Dream Nirvana

i bought TNT BactorrS13 so it would help my roots getting healthier because i still got root rot besides no light leakage, constant water temps of 19-20°C, it darkens the water A LOT but i read a lot of goof stuff about those bacteria. Yes, its not THAT good in hydroponics because a lot of them are supposed to be in earth. i saw a lot about hydroguard - about how bad the company is - but how good the product itself is. But that SHIT IS EXPENSIVE. and almost not available here in germany. so i made some reseach and found out it's the bacillus amyloliquefaciens that's so good and what helps prevent root rot or other pathogen bacteria to grow because it outgrows them and the TNC is so much cheaper shit im way too high rn lol