Extra Large size Undergravel Filter Box full set including acrylic UGF box, high quality Ista plate, uplifting tube and plastic airstone (easy to clean), airline tube and valve. Just add the soil, place it in the tank, connect small air pump and you're good to go. 
Ista tube with plates are made in Taiwan and the best ones on the market, don't mistake with cheap alternatives they will never work as good as Ista products.

(XL) UGF box internal dimension:
15 x 21.2 x 8cm
6 x 8.5 x 3.2 inches
Soil volume: 1.81L / 0.48 Gal - about the same as standard box

This box has more surface area with the same amount of soil compare to the standard size UGF It makes it clog less often.

PLATE FITS VERY TIGHT - NO GAPS FOR SOIL TO GET THROUGH THE BOTTOM!

Acrylic UGF box is made of 4mm thick acrylic glass, and it's thicker than other sellers offering (only 2-3mm). This makes this box very durable!

UGF boxes work great in breeding shrimp setups especially for Caridina shrimp when you fill them with active substrate. It's a good way to lower the water pH without using too much soil making them very economical to use. Standard ugf boxes (like this one) only hold 1.8L of soil and only one is needed in the tank up to 60L. It can last for over a year! 

I've been using undergravel filtration and particularly these UGF boxes in most of my setups for over three years with great success. You can find more information about this filter from my videos on my channel.
 
By buying this set you supporting my YouTube channel!

Thank you,

Leon from Shrimp Mania.