Lobster Lady's Emergency Helium Calculator:

If you are like me, and you start to worry about how much your fill will cost and you know that you already have 1000psi in the tanks you might find this useful.    I set it up so that when I go to the store I know ahead of time what the Cuft of helium is going to cost me.  I also use it to compare prices, look at different ENDs, PP O₂'s  and generally fiddle around, It gives me all the stuff I want to see on one page.    There are some caveats though.   For example  the spreadsheet does not allow for the pressure that the store might have in their Helium bank thus making sure the fill is possible.  Watch out for this before you get there, or take your laptop ;-) like I do.  Oh yeah, and don't be using this this sheet to do your mixing, use a real mixing software.

Download or Open   Right click here to download

Coming soon.... The quest for the perfect stage/deco bottle!!!:

I think if you count it up I have made at least 5 attempts to get it right when rigging stage or deco bottles.    Gradually over time I have tried all kinds of ways to do it and was beginning to think it would never be right.   Then I began doing  more repetitive deco dives and going on multi day trips with deco involved and no chance for refills.  This meant Yikes!! now I have to take bunch of full ones with me already,  so I bought some more.   Armed with my new tanks I was determined to  make these ones "Perfect" and fix the rest once and be done with it.     I can't take credit for the ideas and directions on this page because they came from a friend who helps me with lots of stuff and won't let me put his name on anything.   BUT  suffice it to say,  he did think it should be put on the website so that some good information will be available to help people like myself.