I wish I could dive again, but I wouldn't risk it. I had dreams as a kid
that I was in water, and went under, and I could breathe. The first time I
went down in SCUBA, it was just like the dream. Lots of fun, lots of
adventure, lots of danger in my 12 years of diving. Memories to last a
lifetime. Couldn't estimate how much bottom time I have or hours in a
chamber. And now the equipment is light years ahead of what it was in the
70s. Have fun in the Red Sea. One of the seven people in our commercial
diving class was from Israel, and told tales of diving the Red Sea, sharks,
and such. Be careful and don't push your NO D dive limits. We would repet
out of N, O, and Z groups. Ah, to be young and stupid again ...........
I could probably do some surface snorkeling. Maybe some less than 33'
diving if I took it easy. Most stuff is within that range from the surface,
and after that, it diminishes quickly, both on light and wildlife.
The commercial playing around is a hoot. Ernie's classes sound fun. But
then when you take it to the other extreme, and do it 24/7 in cold water,
bad sea conditions, poor visibility, and just plain bone tired, the old gal
loses some luster. Like those crab fishermen, I've done 24 hours more than
I could count.
Yep, a whole lot of fun tropical destinations with interesting stuff to
see in that range.
Unfortunately his classes are rather far away for me. The CDE thing in
Houston is within reach though. Who knows, if I enjoy that, perhaps a
vacation up in Ernie's direction would be in order.
Yep. Just 'cause I got the dry suit cert doesn't mean I want to spend
much time in cold water. Kind of the same with working in a commercial
kitchen, I had a blast doing that one day, but I don't think I'd enjoy
it much after a week or so.
I graduated from Ocean Corporation in Nov. 1974. It was up on Richmond in
Montrose. Now, IIRC, it is near 59 and 610 Loop. I believe I saw their
tank one time driving 610. I think it's the same outfit, just a few owners
I'm not a pool professional; however, this all seems to be overkill.
The main purpose of this process seems to be to introduce new water,
so why not simply allow the water to drain while running "fresh" water
into it. While this would not ensure that only the "old" water is
lost , the percentage of "new" water should necessarily increase over
time--by the time you've run the equivalent of enough water to fill
the pool, I would think the ration of new/old would be pretty
favorable. I would guess that if you drain from the bottom and
introduce more water from close to the surface, minimizing water
movement as much as possible, the vast majority removed, at least
initially, would be the water previously in the pool. If you could
verify that the critical level the water could drop was actually more
than 1 foot, you could drain to that point before introducing new
water, making the process more effective. My other concern with the
intial solution is how to remove the liner once the pool is refilled;
my suggestion would be less effective at ensuring the complete removal
of old water but much more efficient with time and effort, I think.
I think this is a valid idea and the version 2.0 where you start with
the membrane at the bottom is probably the best.
BTW I agree you should never let your chemicals get this bad and the
50" - 70" of rain a year we get tends to freshen the water but what if
your pool was suddenly full of sea water after a hurricane? This might
be a way to get it back in shape in a hurry.
If it was sea water, you would want to start with the membrane at
the top and put the fresh water in at the top since the sea water
is heavier. With just pool chemicals, I don't think that the density
difference would be enough to matter.
Ah, this is one of the best threads in a long time.
Of course bricks is a silly idea (love the part about Thompson's Water
Seal) but strictly speaking, if one were do do that they wouldn't fill the
pool with bricks but only a weight equivilent to the level of water needed
to secure the pool. A few boards on the bottom to distribute weight evenly
and there's no reason for damage since a few tons of bricks should be no
different than a few tons of water.
On the other hand with weight only at the bottom if the water table is
really high there's nothing to counter side pressure and the sides could
Can we add some carpet stretchers going across atop the (sealed!) brick
pile to put pressure on the side walls? Hehehe
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