I have a 55gallon fresh water tank that I have had continual problems with for 2 years.
I recently moved, the tank has been set for 3 months.
I have African Ciclids, one Pleco (the other one died a couple of days ago)

and one Goraumi.
The water is cloudy and the glass is covered in a white film, no mater what treatments I give it, or how many water changes I do. I also have little black flies living in the filters, and now I notice small white larva attached to the glass.
What could be wrong, and what can I do?
If anyone can help I would appreciate it.