On the coir sub. After making a few shoeboxes I think about 100g coir per jar is about right. I add about 1/2 cup vermiculite to that. (I don't know the metric conversion for a cup)
The coir bricks I buy are 450g and a full one makes 4 shoeboxes. Those are 5.7liter bins.
If that helps.
And it's ok to peek at the jars. The light will not hurt them unless you set it in the direct sunlight.....i think. I peeked at mine all the time.
Great! Thanks for that! I'm trying to get a formula down that's easily repeatable each time. This really helps get me there.
The grow box I will be using for all 12 jars will be a 70L tub, same type Bod uses, just in metric and with a black rubber seal instead of blue. 70L is between the 54qt and 80qt sizes in the states. This was supposed to be my storage bin for my supplies, but well, now it's going to be used for growing so I don't have to make up multiple shoeboxes plus buy more. Lessons learned, I'm not mad; I get a bigger tub in the end to grow.
This would mean, 12 x 100g coir = 1.2kg of coir which is 2x 650g bricks giving me a total of 1.3kg; that should be acceptable if there's extra. Water weight I have read (bod's update for 2020) it can be 3.5-4x the weight of the coir. So, on the low end (3.5x), the water weight would be 4.55L. For the verm, it would be 6 cups total (I've got a US/Metric measuring cup so that part was easy).
My plan is to use a regular bucket (bucket tek) and to get a 20L bucket (5.28 gal) to use for the mixture. This should be sufficient for the bricks to expand? Coolers (insulated) are mad expensive right now where a simple one is over $260. There's a camping boom right now which is driving the prices up on things used for camping.
Edited by rhapsodyclaymore, 05 June 2021 - 10:31 AM.