Under gravel filter

[fishbum]

I stand by what I said in post #10.

 

[rhodes_96]

Hey guys, i just bought a ugf for my 20L. i was wondering how much gravel is need to cover it for max efficency, i have about 3 inches of gravel on top now. The other thing was, how offten should i clean the whole thing? Would once every two weeks work? The tank will be a breeder for marble crayfish gonna have around 10 or less adults in there. i also have a fluva c2 filter on the tank as well. Do yall think that will be enough bio filtration for the tank, i can always add another filter i have laying around.

Thanks
LostFish

Do you mean 20L or 20g or 200L for your tank size?

 

[Bderick67]

Keep your gravel to only about 2" in depth. A gravel vac about once every two weeks will be sufficient.

Do you mean 20L or 20g or 200L for your tank size?

20L here in the states is often referred to a 20 gallon long tank.

 

[ar0wan]

#1 - A well maintained tank can use an UGF for it's primary filtration
#2 - Wat an UGF saves you in Cost is made up for in Labor
#3 - A tank that relies on an UGF as it's only filtration always looks dirty - IMHO