For starters, I wouldn't call these giant- they are exactly the size you'd expect and fit just fine in nano tanks (my UNS 45U).
If you're looking for the blackwater look, these are the way to go. Just 2 of them in my 10G and by the end of the day the water was such a gorgeous rich brown. My shrimp have not left the cones alone since addition.
Definitely going to become a part of my regular restock order.
Love the look of the tannins in my water. Future shrimp will be happy!
Loved everything about my order. The packaging was absolutely superb!! Will be ordering again in the near future!