I think knowing what your CO2 and phosphate levels would be a good place to start in trying to fix your problem.
It sounds like all your issues started when you upgraded your lighting.I am at a loss to why though.
You had problems before adding the CO2 right? Do you think the CO2 has helped at all? I have pressurized that shuts off with the lights,and then comes on about an hour before the lights come on so there is the proper amount of CO2 in the tank before the photo period starts,and shuts off when it stops.You might try shutting off your CO2 with the lights,but if you had problems before the CO2,this probably won't help. That pic you posted looks like your cloudy water is not from algae.If your ammonia and nitrite levels are at 0ppm then I'm not sure from what.Have you changed your filter pads lately? You could always try a UV filter as well,but they are expensive. Try dosing with Excel when you can get some.Take a syringe and fill it with Excel then squirt it right at the BBA,as well as dosing the entire tank.This spot shotting with it is supposed to help get rid of it.
It sucks you are having so many problems with your tank.Don't give up though,planted tanks are very rewarding when you get it right!
Good Luck!!