Water conditioner · Dechlorinator
Seachem Prime 100 mL
Maker dose is 5 mL per 50 US gal of new water; dose the measured new-water volume unless adding directly as instructed.
Concentrated fresh- and saltwater conditioner for chlorine and chloramine treatment.
Consider: Small water changes need small measured amounts. Use a graduated measuring tool and the exact bottle instructions; do not estimate tiny doses by eye.
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US version, item 0435. Check what’s in the box before you buy.
Specifications that affect fit
Before choosing this model
- Calculate dose from actual water volume being treated.
- Check local tap-water disinfectant and follow the current label.
Before you buy, see which tools make water changes easier.
Check it against your tank → Something not working? See the troubleshooting guide.
Included items & upkeep
- 100 mL bottle
Plan for the routine work
- Close and store the bottle as directed.
- Record dose and water-change volume to avoid memory-based redosing.
To budget for replacement media and supplies, use the first-year cost calculator. For how often and how to clean it, follow the maker’s manual.