New tank has cloudy water? not enough filtration?

[johnnysk8s]

I have a 20 gal tall that I recently made into a planted tank. It has been a month now and the water is still very cloudy. I had some initial trouble with what I think was green spot algae, but I have lowered the photo period to 8 hours, and the algae situation seems to be getting better. My concern is the cloudy water. I have changed out the filter 3 times in two weeks. It looks like thousands of tiny bubbles? I am wondering if my hang of the back filter that came with the tank is the issue? Thanks for any help I may get. Here are my specs

20 gal tall
T5 x4 daylight bulbs
Regular off the back filter that came with tank
DIY CO2 with 1 bubble in tank/5 sec.
Flourite substrate
Flourish Micronutrients
Leaf Zone Potash
72 degrees
photo period 8 hours
ph 7

2 platies4 neon tetras
2 cory cats
2 black skirt tetra

4 amazon swords ( I know that is too many)
1 java fern
3 money warts

4 neon tetras
2 cory cats
2 black skirt tetra

4 amazon swords ( I know that is too many)
1 java fern
3 money warts