Under Gravel Filter System

[andyandaliwwfc]

Hello there , i am new to this forum but have had tropical fish for many years , i am looking to put an under gravel filter system in my elite 60L tank , does anyone know the correct size for the plastic filter that i would need for this tank ?? i am currently also using a fluvel u2 as thr filtration but need somthing to clean the gravel too


hope someone can help