I really feel like it just cooled too long after pc. When it’s in a large vessel it doesn’t solidify instantly or uniformly. It takes several minutes for that to happen and doesn’t necessarily just skin over on top. The recipe could be off or the agar could be bad, but the most likely scenario is just that it started to set before it was poured. Were you monitoring the temperature?
I am getting new ingredients and will try again. I need to find a more manageable vessel I used a apple cider vinegar bottle but I need something more short and stout and easily pourable.
How soon after it’s PC’d should it be poured. Like when it manageable right.