Under Gravel Filter Box UGF for Shrimp Tank – Full Set (Standard size)
This Under Gravel Filter (UGF) is the perfect filtration solution for Caridina shrimp tanks. Designed to work seamlessly with active substrates, it helps to maintain stable water parameters by naturally lowering pH without the need for large amounts of soil. The UGF promotes biological filtration by encouraging beneficial bacteria growth beneath the substrate, ensuring a clean and healthy environment for your shrimp. It is ideal for shrimp tanks, providing gentle filtration while supporting your tank's ecosystem.

Includes:
Acrylic UGF box
High-quality Ista plate
Uplifting tube & plastic airstone (easy to clean)
Airline tube & valve
Just add soil, place it in the tank, connect a small air pump, and you're good to go.
 
UGF Box Dimensions:
15x15x10(h) cm (6x6x4 inches)
 
Suitable for tanks up to 60L
 
Shrimp Mania's comment: This exact box is used by professional breeder Darick from Shrimps Affair in all of his tanks (over 160). 
I've been using under gravel filtration and particularly these UGF boxes in most of my setups for over three years with great success with caridina shrimp. You can find more information about this filter from my videos on my channel.