wet/dry versus canister filter

Rohn, If I understand your post correctly, you have a saltwater tank with corals. Most people use live rock and live sand for their filters in this type of tank. Generally wet/drys and canisters are not used. Do you have live rock and sand?

As to specifically answer your questions, I can not as I have no experience/knowledge with either one.

Frank

Well, I always thought that a wet-dry was best for biological filtration and the canisters for chemical and mechanical filtration. You're not using your canister for biological filtration are you? I wasn't aware that people generally did that.

I've always thought you need both. Or go the LR - LS approach.

I have a FO tank with a fluidized-bed filter for bio and 2 canisters for mech.

Are you having problems that you want to do this? Seems to me a 15 gallon wet dry AND a canister filter should be doing the trick. I would have thought just the 15 gallon wet-dry would have been enough.