How to wash and Buffer Coco Properly:
1. Rehydrate the 5kg Coco Brick in a 100l+ tote. Normal, chlorine tap water should be fine. I disinfected the tote with Starsan just to be sure there is no mold or mildew spores that can contaminate the Coco. I invest quite a lot of money and time in my grows, so I will rather be safe than sorry. I will therefor disinfect everything with Stars an before it touches the Coco. I make 1l in a spray bottle and just rinse everything with it. Note: the sanitizing is optional but advisable.
2. Make a slurry with the water and Coco. Drain all the rehydrated coco through a strainer. I drilled a few holes in a 10l bucket and is working very well for me. I also take a hose and run water through the Coco in the strainer to make sure I wash off any salts, dust and sand. Transfer the strained Coco to another clean tote. After the first run, you should find a lot of sand in the bottom of the Tote. (Picture attached)
3. Repeat step 2.
4. Add a calmag buffering solution (50g Calmag Nitrate to 20L water) to the rinsed Coco. Make sure the solution covers all the Coco. It should make a slurry as well like in step 2. Let it stand for 8-12 hours.
5. Strain and rinse the Coco again and transfer to a clean Tote.
6. Make a fresh buffering solution, add to the Coco and let it stand for another 8 hours.
7. Strain the Coco and press out excess water before transferring the Coco into grow pots.
8. Use Hydroponic nutes phed down to the nutrient specifications. I like to keep my Coco PH between 6.3-6.5.
9. Grow hydroponic product with the forgiveness of soil minus most of the diseases and pests.