I do my water changes fortnightly..l squeeze the sponges in a bucket of the tank water and clean the media in the bucket too..l did leave it a few days later than usual could it be that
I have had a 240 litre fish tank for 7 months and not had a problem until a couple of days ago l did a 25%water change which l do fortnightly and its usually crystal clear with a day but it didn't clear it was milky so l did a 75% water change but it didn't clear up so l thought it may be the...