Ok, assuming you mean you had the tank running for 2 months without fish, I would definitely say you are in a cycle now after adding all those fish. That's a lot of fish for a new set up. Watch the fish for any signs of distress, coming up to the top gasping for air, difficulty swimming, etc. If the fish are acting strange in any way immediately check your water conditions as if the ammonia or nitrites are too high, this can poison them and you will need to do a water change. Try to refrain from changing the water too often as this can prolong the cycle. This could be a lot of the ich problem as well because that is a byproduct of stress. Ich is an organism present in all tanks and usually flares up in stressful situations.
As to the UGF, take the carbon off and if necessary get more airline to make your airstone reach the bottom of the tube. The UGF actually uses your gravel as a filtration "sponge" if you will by pulling the water down through the gravel as through a sieve. That is why gravel vacuuming is necessary when doing water changes about every 1 1/2 to 2 weeks and try to only vacuum about 1/4 of the gravel each time as the "good" bacteria lives in it. Also I would strongly recommend using a powerhead on the UGF tubes as the Marineland Emporer 400 will still not provide adequate filtration for a tank of that size with that amount of fish. The carbon takes things out of the water but is not important at all in the tank. It will, however, remove any medications you put in.
