I personally grow in large filter patch bags, the bag is the liner! Lol, thays an absolutely beautiful ? flush. Here's what a flush from one of my bags looks like
I guarantee that out of everyone here I have had by far the most issues with contamination,most people that try an fail for as long as I did would just give up i went almost 2 years batch after bat h maybe every 5th try id get something to finally grow, it was about 18 mo ths this went on until i finally built a flowhood.
Buti say that to say this, every technique and method i use is specifically geared around high contamination rates and how to beat them every step of the way
Look up my grow method i have posted, I believe my tek is awesome for bulk as well as personal growers.
I had an infinite number of problems spawning grain in open air , even though it was straight to coco/verm.
What I believe happened, because I grew successfully this way fkr a few years then 1 time I got the mean green and ever since that 1 contamination everything g went downhill.
I believe the spores spread inside my grow area and Into the ac and I believe it started growing, so I had trichoderma mucelium floating around , which is a game over. Even with 100% clean spawn grain, spawnjng to o ly coir and vermiculute, which are extremely contam resistance, a strand of trick mycelium WILL ruin clean grain and coco coir.
The spores will not but live mycelium.will.
So the all in 1 bags allow for a nutrie t rich su strategy that stays completely sterile throughout the grow to fruiti g