What an unusual container medium. Is it going to smell as unbelievably horrid as it sounds like it's going to? ;-)

Good luck finding your shrimp compost! I've only heard of the Biomax product.

I've never heard of shrimp compost, so the following might sound a little weird: Asian grocers carry dried shrimp which could probably be pulverized and used in your mix. Don't know how much you need, but even a little might supply the nutrients you are looking for.

There is a place in Bayou La Batre Alabama. Gulf Coast Agricultural & Seafood Co-op. They make not only shrimp meal compost but they make crab meal compost. Please call for more information. The bags are very inexpensive 251 599-4148