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MZ Monotub General Questions

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Hi All,

I'm a long time lurker, first time poster here to shroomology. I've tried several different teks, and have done MZ's monotub design around 8 - 10 times (with varying levels of success). I'm about to start another round, and had a few questions that arose from my previous experiences:

1) In the Monotub tek, under the substrate preparation, it says to use "1/2 brick of coco coir". Does anyone know the exact measurement of coir to use?

2) During my spawn run, I've found that once I remove the aluminum foil after 10 days, there's a puddle of sitting water on top of the colonized sub, along with shrinkage along the sides of the tub. I've read some conflicting information, so I was wondering: Is this from too much or too little FAE? I've also tried to use as little airflow as possible during the 10 day spawn, but have ran into contamination. 

3) When picking the fruits, where does the mushroom end and the substrate begin? I want to make sure that I remove all of the mushroom so that they don't rot, but I also don't want to rip out a bunch of the substrate

Thanks in advance! let me know if more info is needed

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