I think Biggen got a detrivore kit from them
That is correct. I seeded my DSB
with a detrivore from them about two months ago. I will admit when I got it I was like, "I paid $70 for this!!!". All the animals are so small that it was hard to justify the money. But then when I realized that the bags literally contain thousand upon thousand of infauna, stars, shrimp and worms it was money well spent.
Heck, if I had to do it again, I wold buy two. You really can't go wrong...