I take it this is your first time cultivating, you seem to be a bit confused about what casing is.
Are you doing the pftek or bulk substrate? it sounds like you're doing bulk.
Now why exactly are you wanting to stack casing? Casing is something you put on top of fully colonized substrate in order to trigger pinning (beginning formation of the fruiting body). The mycelium colonizes the casing and then fruits. I don't know why you'd stack your cultures though, you could put them all in the same fruiting chamber but stacking them would interfere with fruiting.
Let me know if this helps, as I'm not sure I fully understood what you're trying to do, and in the meantime check the shroomery (a website) for some good guides.
Could you please stop posting a new thread every day or so, about your grow? Actually we have a mushrooms cultivation subthread if only you would use the advanced search function or check the Big & Dandy Mushrooms thread in the Psychedelic Index and look for the subthread list in its OP.t plastic boxes / jars that have filter lids which saves you some work.
Are you even reading my posts? Please get a grip, refer to the cultivation thread or expect to have your posts/threads moderated into a more neat concentrated place.![]()

I take it this is your first time cultivating, you seem to be a bit confused about what casing is.
Are you doing the pftek or bulk substrate? it sounds like you're doing bulk.
Now why exactly are you wanting to stack casing? Casing is something you put on top of fully colonized substrate in order to trigger pinning (beginning formation of the fruiting body). The mycelium colonizes the casing and then fruits. I don't know why you'd stack your cultures though, you could put them all in the same fruiting chamber but stacking them would interfere with fruiting.
Let me know if this helps, as I'm not sure I fully understood what you're trying to do, and in the meantime check the shroomery (a website) for some good guides.
http://www.bluelight.ru/vb/threads/586800-growing-bags-vs.-substrate-jars-to-grow-shrooms
So, refer to the cultivation thread please! And it would be decent if you'd reply to my elaborate posts, I put in some time and effort and you just seem to be creating new threads for every new question you think of.
I do have understanding for you growing for the first time (hence my replies) but you are not the first person to grow and a lot of these answers are out there, so start using google and if you still have questions USE this thread:
http://www.bluelight.ru/vb/threads/378996-Mushrooms-Subthread-Different-Strains-amp-Cultivation
or at least use the same single thread for all your Q&A
Otherwise I'll be closing threads, this is a message board not a hit and run site you can flood.