cloudy as in having particles in the water columm? if so,u cud put a filter sock at yr overflow area to remove them. u could also use an ozonizer,this you will have to use with an ORP controller. overdoze can nuke yr tank.
I got a protein skimmer and the water started looking great I still have a little haze which i mean little but i can deal with it. I just wish i could get the water as clear as some of the commercial tanks i see