Figured that out of hydro means the tank should not be filled-regardless of VIP. Just was not sure as do not want to be stuck trying to get a tank filled at the last minute only to have it rejected due to the scenerio. Then having to rent a tank.
FWIW-
I did not personally get the tank VIP'd the last time out. Loaned the tank out to a neighbor for lobster season and it was out of VIP. Neighbor got it VIP'd so he could dive the tank for the week. I told him that if he did both, I'd reimburse him- probably the case that there was just not enough time to get it hydro'd when he went diving. Tank Hyrdro expires in November of 2011, VIP in July 2012.
Got another tank that has a out of hydro for March 2012, but VIP good until July 2012. Not a great difference-for some 5 yrs of use. the other tanks all match up, but they were all done VIP/Hydro last fall 2010
There is a Scubaboard member here who lists tanks for sale who's shop is near where I work. Like the idea of using a SB member (plus his prices are really good). When the hydro expires, I'll get the tank to him to get it ready to go.