I have just put a bag of aragonite sand (1cm) into my 300L tank and even though i washed it a dozen times before putting it in, it is making my water cloudy, I have done 5 full water changes and even vaccumed the sand several times but its still making my water cloudy.

Am I doing something wrong?

It should settle after a while - unless you have a Goldstripe Maroon clownfish who likes to stir it up all the time when wriggling around in an anemone on the bottom of the tank :evil:

What filter are you running, you could try putting some filter wool in it to try and polish the water for a bit -you will need to take it out carefully and rinse it often or it will get clogged with the 'dust'.

its driving me insane!!! :evil:

I have a Fluval 405 running, so was going to fill it up with filter wool hopefully that it will help it clear. I have been swirling it all around this morning while I am emptying the tank to get some of the dust out.

What if i were to put some charcoal in there as well? Will that help clear the water?

It will clear with time.. No matter how much you wash it it seems to happen, adding charcoal won't achieve anything, if anything just pack your filter out with filter wool to try and catch the small particles..

okey dokey..

Rubber band the filter wool around your intake instead of putting it in the filter. It's easier to stick your arm into the tank and remove the filter wool that way than it is to drag the whole filter outer.

also, is it ok to put fish in while a little cloudy? or leave til it settles down?