Official Psilocybe zapotecorum thread

I’m trying to grow zaps for the first time. I had five litre jars of colonised rye that I mixed with coir in four tubs of 7 litre each. Each tub its own jar, and the extra jar was divided over two of them. That resulted in two tubs of about 1:3 spawn to coir ratio, and two tubs of about 1:3.5. After about 5 days all tubs looked like this:

Thin wispy mycelium that reminds me an awful lot of mold, and 5 days seems quick to me, even more so with zaps. Is this indeed mold? Or is this what actual zap colonised bulk substrate looks like?

The jars were inoculated with a single Agar plate that looked very clean and beautiful and definitely not like mold at all. It was a T1 plate from a spore print. The colonised jars all looked identical. I bit different to cube grain spawn. Tomentose, a bit drier than what I’m used to with cubes, easier to break, but nothing that made me worry really. I did not use any nutes or additions to my bulk substrate, and the grain jars were 100% colonised. I also let them consolidate for about a week before spawning to bulk. The coir was not pasteurised, but hydrated with hot water in a cooler. The prepared coir was stored in the cooler for about two weeks.

If it is indeed mold, where did it most likely go wrong? I hardly ever get mold contamination in grain jars, so I if all four grain jars were actually contaminated with the same mold because of sloppy technique doesn’t sound very likely to me.

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