This is a collection of direct links to our knowledge base of educational content that appears on the Dive Gear Express website mostly in the form of brief blocks of diving related information that are distinct from our product descriptions and administration content. This knowledge is primarily focused on
experienced sport and technical SCUBA divers. It may not be useful to those just now learning to dive, and in some cases might even contradict instructor recommendations to entry level divers. Our popular Tek-Tips are product independent information attached to the bottom of various category and product pages. There is some product related information, such as our opinions on specific product selection or usage, that we list in a separate Product-Tips category. We have a few longer discussions that we list under the Articles category.
Compressor Lubrication for SCUBA
Compressor Lubricants and Diver Safety
Nitrox and Compressor Lubrication
Orange, Yellow, or White, which is better?
"OMG" Is your QR insurance paid up?
Where do I get replacement batteries?
Marine Grade Stainless Markings Must Be Annealed
Your Hands and Feet Can Be Larger When Diving
The R-22 and R-17 type oxygen sensors in diving
Aluminum vs. Stainless Hardware
Dust caps with DIN-to-Yoke adapters are not best practice
Is My HP Tank 3/4 NPS or 7/8 UNF Neck Threads?
A unified and robust solution for dive logging software
Rigging the SPG on Stage and Sidemount Bottles
How Deep is DEEP and How Cold is COLD?
Open Water Students and Modern Equipment Configurations
Seriously, Do Not Pee On That...
The 411 on Dive Instrument Consoles vs Wrist Mounts
Rechargeable Battery Chemistry for Dive Lights - Lithium Ion
When is Enough... Enough?
How do you stay warm in a neoprene wetsuit? Take it off.
About Gas Time Remaining (GTR) Calculations
Diving and Blue Pills
Helium Penalty? What Penalty?
Calibrating Oxygen Analyzers for Diving
Bühlmann versus VPM Decompression Schedules
Using a Signal Mirror for Rescue
SCUBA Cylinder Neck Threads in North America
Handling Emergency Oxygen Kits
How do the grades of compressed oxygen differ?
Lubrication and SCUBA Valve Installation
Do I really need that big NITROX wrap decal on my tank?
Units of Pressure in Diving
Sunscreen and Dive Computers
Metric vs Imperial SCUBA Cylinder Sizes
Servicing SCUBA Hoses
Quick-Disconnect Compatibility and Lack Thereof
How to use a twist-on handheld dive light or strobe
Damaged 300 bar DIN valve outlets
Can Nitrox or Trimix be run through a breathing air compressor?
A Battery Warning Means You Are Diving On Borrowed Time!
A Common Mistake When Using Tables for Repetitive Dives
About the U.S. Diver Down Flag
Advice for Traveling with Rebreather Cylinders
Learning From Analysis of Rebreather Deaths
Are Rebreathers Safe?
Using the metal grommets......
Backup Second Stages
Selection, Care and Maintenance for Guideline Reels
Bad BCD Maintenance = Provoking Instead of Preventing
Beware of Fin Hyperbole
Buddies and BC Integrated Regs
Care and Feeding of Lithium Chemistry Rechargeable Batteries
Choosing Stage/Deco Regulators
Choosing the Best BC Power-Inflator Hose Length
Choosing the Best Primary SPG Hose Length
Cleaning Low Current Electrical Contacts
Common Uses for Stainless Steel Snaps
Compass Balance Zones
Just Say No to Deep Air
Do You Know Your Right From Your Left?
Does the Vindicator knob make sense for experienced divers?
DPV Battery Technology Tradeoffs
Open-Circuit Etiquette with Closed-Circuit Divers
Evolution of Manifolds and Bands
Finger Spools Are Not Guideline Reels
Form vs. Function in Dive Masks
Full Face Masks and Recreational Scuba
A Gas Booster Reality Check
Gearing Up With a Long Hose
Get the Lead Out!
Give Tank Boots the Boot, Decals Too!
Helmets Have Their Place In Diving
History of the Finger Spool
Hose Protectors Don't
How Long is Your Hose?
How Much and Where to Use Lubricant
How to Choose Between Lift Bags and Marking Tubes
How to Glue On Your Glue-On Pocket
How to Overhaul a Power Inflator
Independent Twins Are Not Doubles
Inside Submersible Pressure Gauges
Installing Valves in SCUBA Cylinders
Interchangeability of Backplates and Wings
Regulator Intermediate Pressure (IP)
Tang? Pommel? Drop Point? Swage? Spine?
Leaking Mask? Loosen The Strap!
Looping Hoses Under Hose Retainers
Lumens, Lux and Burn Time - Caveat Emptor
Mask Defoggers Explained
Candela vs Lumen
Mixing Brands or Ages of Oxygen Sensors
Mr. Cleaning Your Dive Slate and Wetnotes
Dispelling the Myth of the Simple Oxygen Flush Test
Nitrox? Heliox? Helitrox? Triox? Normoxic Trimix? Hypoxic Trimix? Heliair?
Blame Normalization of Deviance, Not "Complacency"
Ordering Vision Correcting Lenses for Dive Masks
The Origin of Hogarthian Configuration
Oxygen Sensor Life in Rebreathers
The Oxygen Shutoff Is a Mixed-Bag
Perfect Positioning of Decals
Piston vs Diaphragm... Does it really matter?
Burst Disks in SCUBA Valves Are Not What You Think
Hogarthian Regulator Configuration for Doubles
Long Hose Regulator Configuration for Single Tank Diving
Streamlined Open Water Regulator Configuration
Sanitizers, Disinfectants, Antiseptics and Your Rebreather
Self-Operated vs Pilot-Operated
Sidemount Diving Has Gone Mainstream
"Sidemount diving makes technical diving easy" - Jeff Loflin
Valves for Sidemount
Single Tank Mounting with Backplates
Who's Your Buddy... Han?
Swivel vs Fixed
Take Only What You Need, No More and No Less
The Best Things in Life are FREE
Threading a 3-slot Quick-Release Belt Buckle
Time to Fly? Maybe Not.
Types of Back Inflation BC Systems
Do You Sidemount Up or Down?
Upstream vs Downstream
ZHL-16C, VPM-B, DCAP, DCIEM, VVAL-18M ... Does It Really Matter?
What about "black face" instruments?
What Color is Your Parachute Bag?
What Happened to Low-Pressure (LP) Cylinders?
What Happened to My Gas?
What if you donate your primary?
What is the difference between "200 Bar" and "300 Bar" fittings?
What Size Fins Do I Need?
Which Wing Do I Need?
Why Black Dive Masks Are Better
Will back inflation float an unconscious diver face up?
You Can't Get Everything On-Line
Inspect Your Regulator Mouthpiece
Will it work with my BCD?
Choosing the Best Regulator Hose Length
SCUBA Regulators and Hoses Nomenclature
Sizing and Selecting O-Rings for SCUBA
Submerge Scooter Comparison Chart
Canister vs Handheld Lights
Optical Coating Masks Are Not "Cool"
Manifold Crossbar Isolator Valves May Not Improve Safety
StainLESS does not mean StainPROOF
Plan Your Dive - Dive Your Plan
Uncoupling DIN Fittings From SCUBA Valves