After the water change this afternoon it was a brown murky but now it's more of a white cloudy-ness. Sometimes I do wonder if it's the wall behind it making it look a bit brown, I might get a background pic and see if that changes it at all.
When you say large water changes how much do you mean? I've been doing 25% water changes for the last three days and am going to get my water tested tomorrow.
It's a Aquaone Ecostyle 38L. I changed out the carbon in the filter for fluval noodles (I think that's what that is called). I haven't cleaned the noodles at all as I thought I wasn't meant to, is this right? Also there seems to be a lot of algae build up. Is it normal to expect a bit of algae/slime looking stuff on the ornaments etc? I do rub the algae off with a algae sponge when I do the water changes.
I have a school of tetras (6) in the tank at the moment, along with a siamese fighter. So all the stuff that looked like dust could have just been all the poop? I'll try and take some pics later on to post.