Your Local Pool Guy wrote:
There are so many different kinds of shock on the market inlcuding
-Calcium Hypo ( the active ingredient )
-Lithium
-Non-Chlorine
-BaquaShock
and More

These are the 4 basic ones out there. If you have a vinyl liner above
ground pool or in ground pool and you are using chlorine then you are
probably using calcium or lithium shock. The difference between the
two is that calcium you have to pre-dissolve for liners and lithium
you do not. Non-Chlorine shock you probably use if you are using
bromine or some other sanitizer for your pool. And your using
baquashock if you are using baquacil as your main sanitizer.

How To shock your Pool Using Calcium Hypo
If you are using a vinyl liner pool then you must predissolve each bag
of shock in its own bucket of water. This stops the shock from laying
on your liner and bleaching it.

Note: Always Use Gloves

Take one 1lb bag of shock and pour it into a warm or cold 5 gallon
bucket of water about
3/4 full.

Note: Always add shock to water not water to shock. Wear clothes you
don't care about cause they might get bleached. Warm water dissolves
shock faster than cold, its your choice.

Use a wooden stick and stir around the shock making sure it gets all
dissolved or as much as your can. Pour the bucket of shock all around
your pool or heave some in the middle. You may have some undissolved
shock at the bottom of your bucket. In this case just dip your bucket
in some pool water give it a swish around and pour it back into the
pool to help dissolve some of that shock.

If you have a bigger pool or a problem and you need to add more bags
of shock repeat this procedure for as many bags as need. DO NOT mix
all the bags together in one bucket.

Tip: Always Shock At Dusk or Nighttime. This allows the shock to reach
breakpoint oxidation. If it were during the day the sun would burn off
1ppm of shock every hour causing it only to reach breakpoint for an
hour instead of 8-10 hours.

Note: most shocks require at least 8 hours with no one in the pool
read the label before adding shock. Also some dealers will tell you
to add shock directly to your skimmer. This is not a good idea
especially if you have chlorine or an automatic chlorinator. Reason
being is because calcium hypo and tri-chlor, which can be found in
chlorine tablets, creates a harmful chlorine gas. To get to the
point, your automatic chlorinator could explode. It's happened.

Shock should also be added every week to ensure a clean and green free
pool.

How to shock a pool with lithium or non-chlorine shock
This one is easy. Just sprinkle the bag of shock all around your pool
as many times as needed. These two kinds of shock do not require a
pre-dissolve and do not require them to be put in at night. But they
aren't as effective at killing algae and are more expensive per bag
than calcium.

How to Shock a Pool with Baquashock
Again this one is easy too. Just pool the gallon bottle into your
pool. You should do this once a month but more is required if your
pool test shows otherwise.

Is there a point to all that? Or just someone wanting to get published?