I'd like to hear from anyone who has looked into getting
Nitrox certified, and has pro or con opinions about it.
1. Is Nitrox really worth the cost of the certification,
tank and regulator cleaning for O2 service, and the high
cost of fills? 
2. The closest dive shop to my home that is equipped for
Nitrox service and tank fills is 90 miles round trip,
which costs me around $10 for gas in the truck, plus another
$10.00 per tank for EAnX 36%.  By comparison, my local
dive shop is 2 miles from my house, and tank fills are
$2.50 (I buy a 10-fill card for $25.00).
Does Nitrox really give that much more bottom time that
it is worth 4-5 times the cost of plain air for the tank fills?
3. What is the maximum safe depth for EANX 36%?  I assume
that the increased risk of O2 toxicity means that the 130'
recreational depth limit for compressed air is reduced by
a substantial amount for Nitrox.  I'm not a depth maniac,
by we usually hit 80'-90' in Cozumel while diving sites
like Palancar, Santa Rosa, and Punta Sur.  Is this unsafe
on EANX 36%?  I notice that Nitrox is starting to be
widely advertised on Cozumel web sites and brochures, like
it is almost becoming the standard there.
Larry Charlot
Last dive 5/17/97,  Folsom Lake-  38', 47 minutes
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