@Heather: I have seen some of your pictures and recordings. May I ask what that black (?) base is they move/grow on? Thanks!

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Comment by Nuno on July 11, 2021 at 0:01

Thank you, Heather! This really gives a great contrast. Must try that out!

Comment by Heather Barnett on July 10, 2021 at 8:57

Hi Nuno, I work with a range of substrates, the black will be either agar poured over felt or agar mixed with a fine black powder (squid ink or charcoal) :)