need best second stage regs for shallow dives

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puk00puk00

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molokai
Here’s a classic concern but I can’t find concise answers to my questions in any old threads, so here’s a new post to stir the pot again… I’m sure many newbies will benefit from your response and opinions

I have several questions about the appropriate second stage regs / octos for shallow reef-edge (to 20 feet) rec diving… I have zero interest in expanding the diving to deeper or colder water.

Dive application/use:

shallow dives ONLY, max 20 feet
warm water, hawaii
shell collecting only, just a little fishing
need low-cost second stages/octos
all other gear already gifted to us; used, mixed brands
ust need second stage
Presently leaning towards Apeks AT20 no breathing adjustments or Zeagle zx octo (deluxe Envoy) with breating adjust or Dive Rite 1200.


Questions:

<sum> Is there much detectable breathing effort difference between low cost ($100) second stage regs at 20 feet?

<sum> Do “ breathing effort adjustments” on 2nd stages make any difference at 20 ft.

<sum> Is there much detectable (breath easy) difference between adjustable "primary second stage" and safe simple octo performance at 20 feet?


<sum> Any suggestions for a few brand choices if you feel some differences exist?

<sum> Prime reason for the three brands in my mind is easy of diy service; I am isolated geographically (Molokai) and want the assurance of knowing the job was done correctly… I have downloaded all the manuals and everything seems as simple as overhauling a firearm or carburetor.
Dive application/use: Questions:
 
https://www.shearwater.com/products/swift/

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