If you're already using the microbes from BioBizz, I wouldn't recommend adding more fungi or bacteria to your soil. The microbes in BioBizz are carefully selected to work well with cannabis and are designed to outcompete other microbial life. Introducing additional microorganisms might cause competition in your living soil, which could result in less-than-optimal symbiosis with your cannabis plants. The bottom line: it's not necessary, and in some cases, it could even be counterproductive.
If you're using the full BioBizz nutrient schedule, you've already got enough nutrients, molasses ect. If you want to dive deeper and play it safe, consider using rainwater or take a look at the composition of your tap water. Many growers experience issues during the flowering phase due to salt buildup in the soil, which can often be linked to the water quality. Avoiding that can make a big difference in your final results! 😄