You have a little problem. Some of those plants are not true aquatic plants, and they will never grow, just rot and ruin everything for you. Get rid of them. I'm talking about the longish-leaved plants, with the silver edges. Also the spiky silver plant in the back. I'm not sure what you have in the foreground on the left side of the picture. Hopefully it's a crypyt (Crytocoryne species), but you may want to make sure it's aquatic. A good place to start is
www.tropica.com for plant ID. Other sites also useful, so a search on google or post close-ups and we'll ID them for you.
So, once you take those out, get more of the Hygrophila. It's the lacey-looking one, third one from the right in the pic. It'll grow really fast and help you out with algae. The other Hygros you had before were good too, minus the algae of course. Also get more of the fluffly-looking stem plants. The one in the back left looks like Cabomba. Needs a fair bit of light but grows fast. The other fluffy stem plants could be Limnophila or Myriophyllum, can't really tell.
Use Flourish ASAP. Hope you're adding CO2 as well. Sorry I didn't really go back in all your previous posts. Adding potassium will help a lot, it's usually lacking in tap water. It's easiest to get a bottle of Flurish Potassium for now, and dose about 10 times what the bottle says. You'll want around 20ppm. (A cheaper alternative is salt substitute, NoSalt or NuSalt, potassium chloride. I always forget what the other one is, K2SO4 I think, check in the sticky at the top of the forum).
Good luck! Get rid of the fake plants and get lots more real ones.
Edit. Oh, thank god you got rid of that blue gravel. Flourite will be good for you!