Doheny's
3-inch trichlor chlorinating tablets
Pool chlorination consumable · 3″ stabilized trichlor tabs · stocked in bulk bucket · loaded into the Hayward inline feeder
Product
Doheny's 3-inch chlorinating tablets · active: trichloro-S-triazinetrione (trichlor) ~99% available chlorine · cyanuric-acid-stabilized so UV exposure doesn't burn off the chlorine in hours
Supplier
Doheny's Pool Supplies (dohenys.com) · mail-order pool supplies; bulk buckets typically 25–50 lb · standard SKU at Doheny's: 3-Inch Chlorinating Tablets · alternatives: HomeDepot Pool Essentials, BioGuard SilkGuard at full-price pool stores
Bucket size on-site
TBD — note lb/kg of the bucket in IMG_0443; weigh empty after consumption to calibrate tablets-per-pound · typical Doheny's bucket is 25 lb (~50 tabs at ~0.5 lb each)
Storage
Pool equipment pad area · sealed bucket · keep dry and out of direct sun · trichlor releases chlorine gas when wet — store away from cal-hypo, dichlor, peroxide, ammonia; never in the same canister as anything else
Refill cadence into the chlorine feeder
| Season | Frequency | Tablets per refill |
|---|---|---|
| Hot season (Jun–Aug) | Weekly | 6 tablets |
| Shoulder / fall (Sep–Oct) | Every 2 weeks | 6 tablets |
| Winter / closed | — | — |
Safety — chemical compatibility. Trichlor releases chlorine gas if it gets wet and mixes with cal-hypo, dichlor, peroxide, ammonia, or other oxidizers. Never store these in the same room or vehicle. Never load anything other than trichlor tabs into the Hayward inline feeder — the sealed canister + flow on top of mixed chemistry is the classic chlorinator-explosion pattern.
Supplier resources
- Product page Doheny's 3-inch chlorinating tablets
- Doheny's account dohenys.com login · check order history for SKU + last delivery date
- Trichlor SDS Safety data sheet · handling and incompatibility reference
Restock log
No entries yet. Track each bucket: order date, SKU, lbs / number of tabs, paid price. Pattern will surface annual chlorine spend + when it's time to reorder.
Cross-references
- Pool category index — the parent page lists every pool-system record
- Hayward chlorine feeder — where these tablets get loaded; cadence above mirrors the feeder record
- Muriatic acid (pH down) — trichlor is acidic and drives pH down; muriatic is the heavy lever in the same direction · together they govern the long-run pool chemistry pH curve