newb help!!

[iceman86]

hey guys i set up a 35 gallon cube aquarium and it looks like everything is dying. I put in sand and washed it. I also put live rock directly from another aquarium. It went through a mini cycle and all my parameters are in check.
ph 8
Ammonia 0
Nitrite 0
Nitrate 0

I then added a xenia tree and a ricordea wich seemed to be doing great and then a couple days later i added a couple clown fish.

The water was really cloudy for a couple days but then cleared off a bit but it is still there today.

The xenia tree has just fallen over and look like its dying and the ricordia keeps shriveling up and has so slime on it. the clown fish just sit together in a corner and don't move.

I am also using city water and i add prime to it. also underneath i have a sump and the water is really clear in there.

Helllppp!!!