i look at it like this a canister is a canister. lol. I mean with me i have had canister, power filters, internal, undergravel etc. in a SW tank i have found that powerfilters are the best because they breake the serfice of the water and let more O2 in the water. but sence i have a wet dry trickle filter i do not need it.
I have an idea i will show you a pic of a 10 wet dry i disigned for my dads 20 gallon tank.