:wall: we have a 500litr salt water tank which is home to bob our porcupine puffer and our two loin fish fred&wilma it is coming up on a year old from day one there has always been a cloudy white haze in the water we do frequent water changes of 25% our salt levels and nitrate/nitrite levels are ok we have spoken to different aquarium shop keepers who have not been able to help we have an EHEIM proffesional filter system we added another power head which made it worse (this was the filter that was recommended with the size of tank we have) we also have been using carbon and changing regulary and fine filter meches please please can anyone help as i do not know what else to try :wall: :headbang2: :wall: