I think you fighting a couple issues...first cloudy water from new tank sydrome....so deffinately read this link as soon as you can...
http://www.fishlore.com/NitrogenCycle.htm the tank has to get cycled and doing it with fish means daily water changes...and if you can get some prime, that will neutralize the
ammonia and nitrites for 24 hours until the next change...id do at least 50% a day...
then you are going to need to upgrade the tank as 2 oscars in a 55 gal (if thats the tank they are in which is in your info) will always have the tank messy unless you continue to do daily changes throughout their life...they are big messy fish for sure
and feeding them some beef heart, fresh shrimp, bloodworms, wax worm, crickets, and pellets should keep them nice n happy...goodluck got any pics?