Filter
  • 4 Sizes

    Seachem® Prime® Aquarium Water Conditioner

    Discounted Price $3.19 - 13.45 Old Price $3.59 - 18.49
    $3.03 - 12.78
    5% off Auto Ship

    Save 25% Off One Item!

    Free Same-Day Delivery!
  • 2 Sizes

    Seachem® Stability® New Tank Stabilization System Aquarium Water Conditioner

    Discounted Price $3.94 - 8.00 Old Price $7.99 - 15.99
    $3.74 - 7.60
    5% off Auto Ship

    Save 25% Off One Item!

    Free Same-Day Delivery!

  • Seachem® Flourish® Freshwater Aquarium Comprehensive Plant Supplement

    Discounted Price $6.59 - 10.52 Old Price $11.99 - 15.99
    $6.26 - 9.99
    5% off Auto Ship

    Save 25% Off One Item!

    Free Same-Day Delivery!

  • Seachem® Flourish Tabs™ Aquarium Gravel Bed Plant Supplement

    Discounted Price $8.33 Old Price $8.99
    $7.91
    5% off Auto Ship

    Save 25% Off One Item!

    Free Same-Day Delivery!

  • Seachem® Alert Combo™ Aquarium pH & Ammonia Detector

    Discounted Price $9.54 Old Price $16.99
    $9.06
    5% off Auto Ship

    Save 25% Off One Item!

    Free Same-Day Delivery!

  • Seachem® Tidal™ 110 MatrixCarbon

    Old Price $17.72
    $16.83
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Flourite® Premium Aquarium Plant Substrate

    Discounted Price $19.27 Old Price $19.99

    Save 25% Off One Item!

    Free Same-Day Delivery!

  • Seachem® Flourish®

    Discounted Price $36.14 Old Price $36.19
    $34.33
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49
  • 2 Sizes

    Seachem® Flourish Excel™

    Discounted Price $36.14 - 66.70 Old Price $36.19 - 69.99
    $34.33 - 63.37
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Marine Buffer

    Old Price $6.79

    Save 25% Off One Item!

    Free Same-Day Delivery!

  • Seachem® Reef Advantage Magnesium™

    Discounted Price $12.85 Old Price $25.91
    $12.21
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Reef Fusion 2™

    Discounted Price $12.99 Old Price $13.99
    $12.34
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Tidal ™

    Discounted Price $8.36 Old Price $16.88
    $7.94
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Cichlid Lake Salt™

    Discounted Price $20.37 Old Price $20.99
    $19.35
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49
  • 2 Sizes

    Seachem® Prime®

    Discounted Price $52.11 - 88.96 Old Price $52.99 - 179.36
    $49.50 - 84.51
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Reef Fusion 1™

    Old Price $12.99
    $12.34
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Tidal™ 75 Matrix Carbon

    Discounted Price $10.13 Old Price $20.44
    $9.62
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49
  • 2 Sizes

    Seachem® Matrix™

    Discounted Price $20.34 - 35.05 Old Price $20.39 - 35.99
    $19.32 - 33.30
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Tidal Matrix™

    Discounted Price $7.63 Old Price $7.99
    $7.25
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Neutral Regulator Aquarium pH Water Conditioner

    Discounted Price $7.24 Old Price $11.99
    $6.88
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Reef Carbonate™

    Discounted Price $6.87 Old Price $13.88
    $6.53
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Tidal™ Zeolite

    Old Price $12.39
    $11.77
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Reef Iodide™

    Discounted Price $10.19 Old Price $20.55
    $9.68
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Tidal Matrix™

    Discounted Price $6.98 Old Price $6.99
    $6.63
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Tidal™ 75 Zeolite Filter Pouch

    Old Price $10.92
    $10.37
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Purigen®

    Old Price $57.19
    $54.33
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Reef Complete™

    Discounted Price $10.27 Old Price $20.70
    $9.76
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Reef Buffer™

    Discounted Price $21.00 Old Price $21.99
    $19.95
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49
  • 2 Sizes

    Seachem® Stability®

    Discounted Price $48.11 - 77.06 Old Price $79.99 - 96.67
    $45.70 - 73.21
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Marine Buffer™

    Discounted Price $21.00 Old Price $21.09
    $19.95
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Reef Plus™

    Discounted Price $10.61 Old Price $10.99
    $10.08
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Tidal ™

    Old Price $13.69
    $13.01
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

  • Seachem® Tidal ™

    Discounted Price $5.49 Old Price $11.06
    $5.22
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49
  • 2 Sizes

    Seachem® Phosguard™

    Discounted Price $32.30 - 60.33 Old Price $60.39 - 65.10
    $30.69 - 57.31
    5% off Auto Ship

    Save 25% Off One Item!

    Sign In & Enjoy Free Shipping Over $49

Seachem Aquarium Supplies

Keep their aquarium sparkling clean and looking its best. With Seachem products, including water conditioners and stability systems, plant substrates, Seachem Flourish plant supplements, clarifiers and Seachem Tidal filters and matrix, you can help your fish not only survive, but thrive. Explore our complete collection of aquarium supplies – and give your fish a happy, healthy place to call home.
Read More
Read Less