ok so instead of 10x with fresh i need 20x with salt? i guess overflow into sump/skimmer, then pushed back out the other side back into the tank. thats how my 125g is set up. i am just looking to salt my 55 and didnt know how much flow was needed since its not a real big tank. i know 10x in freshwater which is what it is now with whispers internals but wasnt sure about whats needed for salt. im prob gonna make my own sump (i have plans and have resealed aquariums before, should be easy) and thought about using a 10gal in 3 sections but also was wondering about that if i should do a 20 long for it instead?