advantage and disadvantage between undergravel filter and wet/dry

[farieslayer]

can somebody help me here, i am thinking about buying the wet/dry filter system.

 

[ironreef]

In sw tank undergravel filters cog and are useless or need frequent cleaning they belong in fw. Wet dry are better but if you have LR,sandLS wet dry isn't needed.If you have 25% tanks volumne with LR or a good dsb mixed with live that will be enough for a biological filter. And it's better cuz they house the bugs/worms that make a tank successful

 

[fshhub]

get a couple of powerhead, and a good skimmer instead, you'll be better off, especilly if you have a dsb and lr