Free tool · Saves locally
Rubber band life tracker.
Latex loses power. Rob Allen has the decay curves. This tool asks when you installed your current rubbers and how you store the gun. It tells you how much power is left and when to reorder. Saves locally in your browser — no email, no account.
How this tool calculates decay
Baseline: 12 months for a 100% → 60% power decay curve under ideal (air-conditioned, unloaded) storage, matched to Rob Allen's 400% stretch decay measurements. Thai conditions never match ideal — every tropical-climate spearo loses rubber faster than the published curve.
Storage modifiers apply on top of the baseline: boat-bag / hot-car storage roughly halves the useful life. Stored-under-tension adds another ~15% decay. No adjustment is exact — rubber aging is a soft science — but the order of magnitude is right.
When the tool says reorder, I do actually stock the matching diameter — the link will take you to the right SKU for your rubber, ready to ship in 2-3 business days nationwide.
For the full decay data, see Rob Allen's Band Power Loss video.
Sister brand · Apnea Total
Run by Diego PauelGear maintenance is one half of the game.
The other half is the diver. Breath hold, relaxation, and in-water composure do as much as equipment. Freediving Koh Samui trains that side.
Discovery Freediving
7,500 THB2 days · No certification. Try before you commit.
Theory, breathing, and two open-water sessions at Sail Rock. Same training as the Beginner Course without the certification day.
Fit for: First timers curious about going deeper than a snorkel breath.
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Beginner Freediving Course
from 9,500 THB3 days · Apnea Total Level 1 certification.
The foundation every spearo should have. Duck diving, equalisation, open-water safety, rescues. Train at Sail Rock and Koh Tao. Max 3 students.
Fit for: Spearos who want a real certification before hunting deeper than 10 m.
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Advanced Freediving Course
from 12,000 THB3 days · Apnea Total Level 2 certification.
Frenzel mastery, exhale dives, depth training past 20 m. For spearos who want to hunt the thermocline and below.
Fit for: Certified Level 1 divers ready to progress past 20 m.
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Static Apnea Clinic
Message for pricing1 day, on request · No certification. Pure breath-hold training.
Focused on extending static apnea through CO2 tolerance drills, O2 adaptation, and mental protocols. The real-world sibling of the Breath-Hold Trainer tool on this page.
Fit for: Spearos whose shot window is capped by breath-hold, not dive skill.
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Fun Dives & Coaching
4,500 THB / personHalf day · No certification. Continuing education.
Refresher sessions, personal best attempts, private coaching for certified divers already comfortable in the water.
Fit for: Alumni of Level 1 or 2 who want in-water coaching without signing up for another course.
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Spearfishing Trip
from 35,000 THBFull day · Guided trip. Bring your own gear or rent ours.
Full-day spearfishing trip to legal Gulf of Thailand waters, led by Diego. Max 2 guests. Same operator as this shop.
Fit for: Anyone with the gear who wants to hunt in legal waters outside the marine parks.
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