The only reason I got a wet/dry filter for my FW
tank is because I wanted to eventually get a SW
tank, and this converts very easily. If you have the tank in a bedroom, the water trickle sounds good, when you're awake. It is very loud at night when you're trying to sleep (think heavy rain).
The W/D filter worked great with my 55gallon SW
and is working just as nice with my SW
. If you don't plan at all on getting a SW
tank in the future, or if it's going to be in a bedroom, go with the canister.