got a free trial... shrimp calcium feeder, with my algae cookies I ordered

[Magnum Man]

I've tried several kinds, and no one really seemed interested... I put it n my cherry shrimp tank, and it was completely covered in 5 minutes...

glass is too dirty for a close-up,

this is what this is...

https://www.amazon.com/Aquatic-Foods-Inc-Crayfish-Tropical/dp/B0D9KX35Z3/ref=mp_s_a_1_1_sspa?crid=2MO9MI7JAJ2GS&dib=eyJ2IjoiMSJ9.obalcbBJNrR0ZU5fYngHksfC_v3dWxqmsICowamo485i41W2vBZmj3_JzINQbMwhXNIsvvmf6E6ptQppLjAxNL3meB7vr4LTA2p4b3IRzHBG-qMYgeVX7O3f3uhNxeLd0XjaLoTr0ZM02AaX0oSmXwL1DxzAHRpjKC0CaDm8s3JK0oXmiV3yBCPl_-bdGi-uf5EKC5TBT0qIcuLJWBCwkQ.sAOy_k7p-azFnzY25GgQR5gvKR8I7rjXWdfE1bg5JxY&dib_tag=se&keywords=medium%2Bsized%2Bcalcium%2Bfeeder%2Bstars%2Band%2Bshells&qid=1760064468&sprefix=medium%2Bsized%2Bcalcium%2B%2Caps%2C294&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9waG9uZV9zZWFyY2hfYXRm&psc=1&th=1