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Rod,

>Mike, if you pack the 155 canister properly, there is no reason to check
>it every three hours for channeling.  On many of my dives that would mean=
 >opening the canister underwater which  would be impossible.=20

I think I do OK with the packing since I have not had channeling and the=
 reason I used three hours in my post was that most of my dives are about as=
 long as a roll of film will last, plus deco, or about one hour.  Once I=
 stayed down two and a half hours, but was bored without film in my camera. =
 Following Leon's and Rich's advice I am going slow with the unit to get=
 time and experience thus I have not had the long deco dives yet.

>I pack mine so that it is about  one-granule-approximate-diameter above the=
 top >after seriously tapping and by vibrating the canister so that maximum=
 settling >occurs. =20

As far as packing my canister, I think I am pretty good at it though I don't=
 have the vibrating apparatus yet : -)

>Then, a piece of  foam, then the top pushed forcefully onto canister until=
 the >o-ring seats.

Where is the O-ring in your canister? I can't seem to find one.

>Then the locking screw. I have never experienced channeling.=20

Nor have I.

>I use the 2.5-5u particle size scrubber so it is big as boulders anyway. I=
 >worry more about Panama Canaling with that stuff. Rod

I am using the small grain since it is so expensive to ship it out here I=
 may as well get my moneys worth.

Maybe I have been diving too long, but I don't think that I have to be too =
 intense about my packing to achieve the desired results. Packing a canister=
 does allow some individualality. Besides, using the small grains, how would=
 I know when I am one full grain over the top or just three quarters of a=
 grain? :-)=20

I am willing to change my technique if you have a good reason to do so, but=
 for the time being I will plod along with conservative dives as I perfect=
 my technique. Then I will meet Rich on my way up with great shots of=
 Odontanthias elizabethae.

You keep mentioning monitor. Is that a lizard?

Aloha
Mike

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