The Blog

Gear Reviews & Dive Science

Written by a chemist who dives. Data over vibes. Real tests, real opinions, real sign-offs.

Gear ReviewsFeatured

Best Dive Computers of 2026: A Data-Driven Comparison

I wore three dive computers simultaneously for 60 dives. The analytical chemist in me couldn't help it. Here's what the data actually shows about the Shearwater Peregrine 2, Garmin Descent Mk3i, and Suunto D5.

Chad WaldmanMar 15, 202610 min
Buying Guides

Wetsuit Buying Guide: How to Choose the Right Thickness

I've shivered through enough dives to have opinions about this. Real talk about the 3mm vs 5mm vs 7mm decision, from someone who dives cold water voluntarily.

Chad Waldman·9 min read
Gear Reviews

GoPro vs Paralenz: Which Underwater Camera Wins?

I own both cameras. I've shot hundreds of dives with each. One of them wins underwater, and it's not the one most people buy.

Chad Waldman·9 min read
Buying Guides

Why Your BCD Choice Matters More Than You Think

Most divers grab whatever BCD the shop has. I did that for years. Then I actually thought about it, and my air consumption dropped 15%. Here's what I learned.

Chad Waldman·10 min read
Science

The Science Behind Regulator Performance in Cold Water

My regulator free-flowed at 28 meters in 6°C water. That experience — and my chemistry background — made me understand exactly why it happens. The thermodynamics are fascinating. The experience is terrifying.

Chad Waldman·11 min read
Buying Guides

Best Budget Scuba Gear for New Divers in 2026

You don't need to spend $5K to start diving. But some things you absolutely shouldn't cheap out on. I'll tell you which is which — no affiliate links, no BS.

Chad Waldman·10 min read
How-To

Underwater Photography Tips: Camera Settings That Actually Work

I've taken thousands of underwater photos. About 90% of them used to be blue, blurry, or both. Here are the specific settings I actually use now — no theory, just numbers.

Chad Waldman·10 min read
Science

Fin Science: Split vs Blade vs Force Fins Explained

I tested three fin types over 40 dives and tracked my air consumption on each. The physics of propulsion underwater is surprisingly nuanced — and the data surprised me.

Chad Waldman·9 min read