Seachem Replenish (250ml / 500ml)
Seachem Replenish is a comprehensive mineral supplement designed to restore essential minerals lost during water changes, especially when using RO or deionized water. It provides calcium, magnesium, potassium, and trace minerals required for healthy fish, plant growth, and overall aquarium stability.
Replenish helps maintain proper osmotic balance, supports biological processes, and improves overall water quality in freshwater aquariums.
Features & Benefits:
Restores essential minerals removed during water changes
Contains calcium, magnesium, potassium, and trace elements
Supports healthy fish, plants, and beneficial bacteria
Helps maintain proper osmotic balance
Ideal for use with RO/DI water
Safe for fish, plants, shrimp, and invertebrates
Trusted quality by Seachem
Available Sizes:
Replenish – 250ml
Replenish – 500ml
For freshwater aquariums only. Use as directed. Best used as part of a complete water conditioning and mineral supplementation program.
Seachem Safe is a highly concentrated water conditioner used in aquariums.
What it does:
Removes chlorine, chloramine, and ammonia
Detoxifies nitrite and nitrate
Safe for freshwater and marine aquariums
Similar to Seachem Prime, but in powder form (much more concentrated)
Why people use it
Very cost-effective
Long shelf life
Great for large tanks, fish rooms, or emergencies
Important safety note
Extremely concentrated — overdosing can harm fish
Always measure carefully
Do not inhale the powder
Store away from moisture
Basic dosing (very important)
¼ teaspoon treats ~300 gallons (1,135 L)
For small tanks, it must be pre-dissolved and carefully measured
Seachem Salinity™ – 29.8 kg Premium Reef Salt Mix
Ultra-Pure, Laboratory-Grade Salt for Demanding Reef Aquariums
Seachem Salinity™ (29.8 kg) is a premium, scientifically formulated reef salt designed for serious marine aquarists who want exceptional stability, purity, and performance. Created for coral-intensive systems, Salinity provides the ideal balance of major, minor, and trace elements needed to support vibrant, healthy reef environments.
Key Features
Laboratory-Grade Purity: Manufactured using pharmaceutical-grade components for unmatched consistency and quality.
Optimized for Reef Growth: Perfect balance of calcium, alkalinity, and magnesium to support SPS, LPS, and mixed reefs.
High Concentration Formula: Produces more saltwater per kilogram than standard mixes—great value for large systems.
Fast Dissolving: Mixes clean and clear with minimal residue or unwanted precipitation.
Stable Chemistry: Designed to maintain consistent parameters, even in demanding coral setups.
Trusted by Professionals: Used worldwide in advanced reef systems, coral farms, and high-end marine aquariums.
Ideal For
SPS & LPS reef tanks
Mixed reef aquariums
Coral growers and frag systems
Large tank setups needing reliable, high-output salt mix
Why You’ll Love It
Seachem Salinity™ delivers professional-grade performance with every batch. Whether you are growing delicate SPS or maintaining a thriving reef community, this 29.8 kg bucket ensures you get consistent, clean, and stable water chemistry—every time you mix.
Seachem Salinity™ – Bulk Drum
High-Capacity Premium Reef Salt for Large Marine Systems
The Seachem Salinity™ Drum is a large-volume, professional-grade reef salt option designed for aquarists, coral farms, and marine facilities that require consistent, high-quality saltwater in bulk. Formulated using laboratory-grade ingredients, Salinity™ delivers stable and reliable chemistry for even the most demanding reef environments.
Key Features
Bulk Capacity: Ideal for large tanks, commercial systems, and high-volume water changes.
Ultra-Pure Formula: Made using pharmaceutical-grade components for unmatched consistency and clarity.
Optimized for Corals: Balanced levels of calcium, alkalinity, magnesium, and essential trace elements to support SPS, LPS, and mixed reefs.
High Yield: Concentrated formula produces more saltwater per unit than standard marine salts.
Rapid, Clean Dissolve: Mixes quickly with minimal residue, clouding, or unwanted precipitation.
Professional Reliability: Trusted by reef clubs, commercial growers, and advanced hobbyists.
Ideal For
Large reef aquariums
Coral farms & frag systems
Marine shops & commercial facilities
High-demand hobbyists using automated mixing systems
Why It’s Great
The Seachem Salinity™ Drum ensures you always have a reliable supply of premium reef salt on hand. Perfect for maintaining stable parameters in large or coral-heavy tanks, it offers both convenience and top-tier performance in one bulk packaging solution.
Seachem SeaGel 250 ml – 1 L
Description
Seachem SeaGel is a premium dual‑purpose filtration media that combines the power of MatrixCarbon and PhosGuard in a single blend to quickly remove a wide range of water contaminants. It targets organic waste, color‑causing compounds, acids, toxic metals, phosphate, and silicate to improve overall water quality without introducing phosphate into the system. SeaGel is ideal for both freshwater (non‑phosphate‑buffered) and marine aquariums, particularly where superior water clarity and purity are desired.
Key Features
50/50 blend of MatrixCarbon and PhosGuard media for broad filtration action
Removes organic waste, color, acids, metals, phosphate, and silicate
Bead‑shaped media for optimal water flow and contact
Works in both freshwater (non‑phosphate buffered) and marine aquariums
Available in sizes from 250 ml to 1 L
More convenient than using separate media bags
Benefits
Enhances water clarity by removing dissolved organics and discoloration
Helps reduce algae‑favoring nutrients like phosphate and silicate
Improves overall aquarium water quality and stability
Protects sensitive fish and marine life from toxic metals and acids
Combines two filtration functions in one media—saving space and hassle
Usage
Rinse lightly before first use to remove dust
Place in a filter media bag or media chamber in a high‑flow area
Use roughly 250 ml per 150–225 L of aquarium water
Ensure water flows through media for maximum contact and efficiency
Replace media after approximately 3–4 months or when water quality no longer improves
Suitable for both freshwater (non‑phosphate buffered) and marine filtration setups
Seachem Seed
Seachem Seed is a concentrated blend of beneficial bacteria designed to rapidly establish and maintain the biological filtration in aquariums. It contains a diverse mix of aerobic, anaerobic, and facultative bacteria that help break down waste, reduce ammonia and nitrite, and improve overall water quality.
Unlike many bacterial supplements, Seed supports both the nitrogen cycle and organic waste degradation, making it ideal for new tank setups, filter maintenance, and after water changes or medication use. It helps create a stable and healthy environment for fish and other aquatic life.
Key Features:
Contains a diverse blend of beneficial bacteria
Helps establish and maintain biological filtration
Aids in reducing ammonia and nitrite
Supports organic waste breakdown
Ideal for new aquariums and ongoing maintenance
Safe for freshwater and marine systems
Suitable For:
Freshwater aquariums
Marine and reef aquariums
New tank cycling
Filter maintenance and cleaning
After water changes or medication
Available Sizes:
150ml
350ml
1L
Seachem Seed is an essential biological supplement for maintaining clean, stable, and healthy aquarium water, supporting both new and established systems.
Seachem Sentia™ Primary – Smart Dosing Made Simple
Seachem Sentia™ Primary is a modern, easy-to-use liquid dosing container designed for hobbyists who want cleaner, safer, and more accurate aquarium maintenance. Built to pair with the Sentia Dosing System, this reservoir makes it effortless to store and dispense your favorite Seachem additives without mess or guesswork.
Key Features
Smart Compatibility: Works seamlessly with the Seachem Sentia Dose pump system for automated, controlled dosing.
Durable & Safe Materials: Made from high-quality, aquarium-safe plastics that protect sensitive supplements from light and contamination.
Simple Refill Design: Wide-mouth opening allows quick, spill-free filling of fertilizers, conditioners, supplements, and trace elements.
Clear Level Indicators: Easily view how much product remains so you never run out unexpectedly.
Customisable Labeling: Includes an area to mark which supplement is inside for organized dosing across multiple containers.
Ideal For
Freshwater and marine aquariums
Dosing fertilizers, trace elements, buffers, conditioners & more
Aquarists using the Seachem Sentia automated dosing ecosystem
Why You’ll Love It
Sentia™ Primary brings simplicity and precision together. Whether you're running a high-tech planted setup or maintaining a reef system, this container keeps your additives tidy, measured, and ready for automated delivery—so your tank stays stable and thriving with less effort.
Seachem Sentia™ Secondary – Expand Your Automated Dosing System
The Seachem Sentia™ Secondary is an add-on dosing reservoir designed for aquarists who want to expand their Sentia automated dosing setup with additional supplements. Whether you’re running a planted aquarium, a reef system, or a specialized freshwater tank, the Secondary container allows you to easily add more additives to your dosing routine with clean, organized control.
Key Features
Modular Expansion: Connects effortlessly to the Sentia Dose system so you can run multiple supplements without clutter.
Secure & Durable Design: Built from quality, aquarium-safe materials that keep your additives protected.
Clear Visibility: Marked volume indicators allow you to see exactly how much supplement remains.
Easy Identification: Includes a labeling space so you can track which product is inside—ideal when using multiple reservoirs.
Wide Fill Port: Simple, no-mess refills whether you’re adding fertilizers, trace elements, buffers, or conditioners.
Perfect For
Planted tanks using multiple fertilizers
Reef aquariums with trace element programs
Freshwater systems requiring regular dosing
Aquarists who want precise, hands-free supplement delivery
Why It’s Useful
The Sentia™ Secondary lets you grow your dosing system at your own pace. Add one, two, or several reservoirs—each integrates neatly into the Sentia modular design, keeping your aquarium additives organized and your water parameters consistent.
Seachem Sentia™ Side Cover & Mounting – Clean, Secure, and Professional Finishing
The Seachem Sentia™ Side Cover & Mounting Kit is designed to give your Sentia dosing system a polished, organized, and secure installation. Whether you're expanding your system or refining your setup, this accessory keeps everything tidy while ensuring the modules mount safely and neatly to your chosen surface.
Key Features
Neat, Finished Look: The side cover creates a seamless finish on your Sentia dosing line, hiding connectors and giving your system a clean, professional appearance.
Secure Mounting: Includes hardware designed for firm and stable mounting on cabinets, walls, or stands—keeping your reservoirs in place and easy to access.
Modular-Friendly: Fits perfectly with the Sentia Primary and Secondary modules, allowing you to expand your system while maintaining a neat layout.
Simple Installation: Snap-on design and straightforward mounting points make setup quick and hassle-free.
Durable Build: Made from strong, aquarium-safe materials built to handle humidity and daily use.
Perfect For
Aquarists building a multi-module Sentia dosing setup
Anyone wanting a clean, hidden, and organized equipment area
Cabinet mounting, rack mounting, or wall installations
Why You’ll Love It
The Sentia™ Side Cover & Mounting Kit keeps your dosing system looking sharp while ensuring every module stays secure and aligned. It’s the finishing touch that turns a functional setup into a professional one.
Seachem Sentia™ Tubing & Calibration Tube – Accurate Flow, Reliable Dosing
The Seachem Sentia™ Tubing & Calibration Tube is an essential accessory for keeping your Sentia automated dosing system precise and dependable. Designed specifically for the Sentia platform, this set ensures smooth liquid flow and accurate calibration so your aquarium receives the exact amount of supplements it needs.
Key Features
Precision Tubing: High-quality, flexible, and kink-resistant tubing designed for consistent flow and reliable additive delivery.
Calibration Tube Included: Makes it quick and simple to measure and calibrate your dosing system for perfect accuracy.
Easy Installation: Fits seamlessly onto Sentia Primary and Secondary modules without tools or complicated setup.
Aquarium-Safe Materials: Safe for use with fertilizers, conditioners, buffers, and trace elements in both freshwater and marine systems.
Clear Visibility: Transparent tubing helps you see flow and identify any blockages or air bubbles with ease.
Ideal For
Setting up new Sentia dosing modules
Replacing worn tubing for improved performance
Ensuring your dosing system stays accurate over time
Planted tanks, reef aquariums, and freshwater systems
Why It Matters
Accurate dosing is key to stable water parameters. With the Sentia™ Tubing & Calibration Tube, you can trust that your supplements are delivered smoothly and precisely—keeping your aquarium healthy with less effort.
Seachem Spoon Scale
The Seachem Spoon Scale is a compact and precise digital measuring tool designed for accurately weighing small amounts of aquarium supplements, medications, and powdered foods. It’s ideal for situations where exact dosing is critical to fish health and water stability.
With a clear digital display and detachable spoon design, this scale makes measuring quick, clean, and reliable during routine maintenance or treatment.
Features & Benefits:
Accurate digital measurement for small quantities
Ideal for dosing Seachem medications and supplements
Easy-to-read LCD display
Lightweight, compact, and easy to store
Detachable spoon for easy cleaning
Simple one-button operation
Trusted quality by Seachem
Ideal For:
Measuring powdered medications
Precise dosing of supplements and additives
Controlled feeding and treatment use
A practical, precision tool for aquarists who want consistent and accurate results when using Seachem products.
Seachem Stability – Biological Starter and Filter Support
seachem stability is a concentrated blend of beneficial bacteria designed to establish and maintain a strong biological filter in both freshwater and marine aquariums. it helps process ammonia, nitrite and nitrate, creating a safer and more stable environment for fish and invertebrates.
stability is ideal for new setups, after water changes, filter cleaning, medication treatments or any time the biological filter needs support. it works quickly, is safe for all tank inhabitants and does not require refrigeration.
what it does
introduces reliable beneficial bacteria
supports new tank cycling
helps reduce ammonia, nitrite and nitrate
strengthens biological filtration in established tanks
safe for freshwater and marine systems
available sizes (select your size above)
stability 50 ml
stability 100 ml
stability 250 ml
stability bonus 325 ml
stability 500 ml
stability 1 l
stability 2 l
stability 4 l