Ive tested water on and off for the past month and everything was alright, until last week the ammonia and nitrates were a lil bit high, i did a 50% water change and vaccuumed the gravel. The tank has had a cloudyness to it ever since i put it up 2 months ago. It is a 40 gallon with a UGF and a Millenium 2000 wet/dry filter. Has Driftwood, gravel, fake plants, a porcelian crab i just picked up last week, 2 gold gourami 1 Opelene Gourami, 3 giant danios, 1 rainbow (other 2 were getting beat up and are in the 29 gallon now), a gold severum, a geophagus, and a jewel. Why wont the tank have clear water!!! My 29 gallon has crystal clear water. I have done everything i can think of to the 40 gallon and it just wont clear. Any advice?