New Tank

[amoreira]

I'm getting a new tank after my old one had crashed and I unloaded it for various reasons. Now I have some live rock sitting in vats of salt water with airstones running and I have some of my surviving coral and inverts sitting in the sump. I'm thinking rather than wait for 2 days for the tank to fill up with RO/DI water I could risk it and fill up the tank quickly with tap water (dechlorinated of course) instead. In subsequent water changes I'd use RO/DI water. I'm however concerned about phosphates and other poisons in the water. Should I risk it?