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lp 72's doubles-shore or nice boat!
single 72's for dumping out of my boat quick
hp 100 single for dumping out of boat deep with pony sling
(i don't like lifting my twins back into a small boat)
hurts my ego
One Doubles set, Worthington steel HP 100s DIN (fuel for future training- need regulators and a bigger wing)
Two single Worthinton steel LP 85s DIN (sometimes used for shore dives)
One Single Worthington steel HP 100 DIN (now my go to bottle for for most dives)
One single sherwood steel HP 80 DIN (was my first bottle, will one day be my stage bottle)
I used to have a pair of AL 80s, but more than once I forgot to add ballast when switching to the AL80 for the second dive. I hate that, so I'm standardizing on steel!
Double lp 85's or lp 72's, singles lp steel 95's, al 80's. Sometimes for giggles I'll sling a 40 or one of my 30's and use it for short shallow dives. Only tank I really don't use any more is my pst hp80. Too short, many of the shops don't fill it right, and it just doesn't get considered any more. Wish I never would have bought it. But it was my first tank and I only knew what the dealer was telling me. Would have been better off buying 4 used lp 72's for the same price.
we use the hp 80's for open water classes,to get some of the weight off of their belts
we have jacket bcds,and it makes an easier transition from pool with no wetsuit to fresh with
i,personally,hate the way they trim on me
Yesterday i dove a HP100 for the first time since last summer and was reminded what a nice tank it is in terms of capacity weight and size. I also have a 130 so i can match capacity with my dive buddies. It is heavy and there would be no point if all you buddies had 80s.
I dive HP130's for my single tanks. I prefer to have more than less gas, and the extra weight is not an issue with me, so it would be HP130's or HP120's which are just a little narrower. Hp100's are as small as I would consider diving locally and I have a couple as loaners. My partner dives HP80's but she is 100lbs and sips gas.
The best question is what does your buddy dive? Better to have the same or more gas then them.
I've always used an AL 63. I have two. For drysuit, I just bought two Steel, HP 80s. I've always sipped gas, I'm trying to decide which tanks I'll use when I switch to doubles, since I have two sets of each. Since I'll be using the drysuit with doubles, I'll probably set-up the steels for the doubles, although I dread the extra weight on land, since we mostly shore dive.
I've really never needed the extra gas. I can do 60 minutes at 80 feet with my AL 63, sometimes a lot longer. I've really actually never had anybody come up with more gas than me, on any dive we've been on. Even in Galapegos I used the 63. Everyone thought I was crazy but I still came up with more gas than everyone else. (PSI comprable to those with an 80, anyway)