I have had a freshwater aquarium for awhile now and I decided to make the switch to saltwater. I have a 56 gallon column style tank, Marineland Double-bright leds, 200w Hydor Theo heater, Rena XP2 Canister filter with different media etc. For right now I am just wanting to do fish and live rock. Yesterday I cleaned out my tank and got all the freshwater stuff out and then last night I put in live sand and live rock and started filling up the tank with my pre-mixed saltwater. The sand instantly clouded the tank to the point I really can't see in it. I figured it's probably normal since the sand has to settle. I turned on the heater so the water stays at the correct temp but the tank is still very very cloudy as of this morning and I can't see inside of it. Is this normal? Does this mean the sand is still settling and it should clear up? If so how long should I wait? I have also yet to turn on the filter so I was wondering should I wait until the tank water clears up before turning on the filter? Ok my last question. My filter is a canister filter and it has various media in it. Would I be ok to rinse it off and put it back in or should I use fresh media since I went from freshwater to salt water. I am not planning on adding fish any time soon I just want to make sure I am doing everything correctly.