Hi , sorry this might sound stupid but am new to tropical fish, I have a 180L Juwel Rio tank at the minute it contains 5 danios , the water has been consistantly cloudy since setting the tank up over four weeks ago, was advised to use filteraid as this would clear the water which was done two days ago the water turned brown straight away but it no clearer ! just rung the shop and they said I should have taken the carbon out of the filter as this stops the water clearing, am getting so much inconsistant advice would appreciate some help ! fish seem ok, according to the local fish shop all readings are normal no nitrite, no amonia ph 6.5 kh normal thats all he said would welcome any suggestions , don't know whether to do partial water change ? thank you xx