The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
Hi there.
If your tank is quite new then it could be a bacterial bloom as its milky. Just maintain as usual and it will clear of its own accord. Don't try and over maintain or medicate.
If when you look very closely you can see particles then your filter may need cleaning and/or needs a final layer of filter floss to 'polish' the water.
Can't ident all you fish from the photo but it looks to be a strange mixture of fish types with differing water requirements. Just an observation but I doubt t would affect your water clarity.