+1. Krylon fusion is designed to bond to plastic better than regular spray paint. Just sand the pvc a bit with sand paper and apply. At only about $4 a can, its easy to do and works great.
If its summer time (NJ), I would say 1 week is more than adequate. A lot of fish keepers have used Krylon Fusion with no known ill effects to any fish for quite some time. The less paint or thickness of the coating, the quicker it will dry. Also, for all we know, pvc could be leaching toxins into the water that we have no idea about, so what's the difference?
I spray paint clay pots and pvc black with krylon fusion and I put the stuff in the next day, never had an issue. The only problem with one coat is chipping. There are directions for two coats and cure time on the can for chip resistance. I have done it both ways but I'm impatient.
