what is an O2 rinse? can you explain more please...reusing coco after like the 4th run gave me hell...so I'm really interested in learning how you guys do it...please explain the O2 rinse..what is O2?Coir is not cheap in Hawai'i. We run it several times using enzymes & o2 rinse. Also adding new coir to the mix every time, the plants break it down.
The problem with coir is that it holds almost zero nutrients.