Aquarium care, chosen with purpose

Brightwell Minerals & Water Supplements

Mineral and hardness supplements for freshwater aquariums. Compare GH and KH support, check species requirements, and test your source water before choosing. These supplements do not replace a chlorine and chloramine conditioner.

Prepare purified water with measurements

Read our GH, KH and RO remineralizing guide and compare the RO Water Kit. Account for overlapping mineral contributions before dosing.

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  • Florin Delta GH+. Kit includes 250 g; supplier image may show another size.

    Axolotl RO Water Kit

    Axolotl RO Water Kit
    $34.88
  • Caridina GH+

    Caridina GH+

    Caridina GH+
    $7.55
  • Florin Delta GH+

    Florin Delta GH+

    Florin Delta GH+
    $12.94
  • Florin Delta KH+

    Florin Delta KH+

    Florin Delta KH+
    $11.86
  • NeoTiger KH+/GH+

    NeoTiger KH+/GH+

    NeoTiger KH+/GH+
    $7.55
  • Remineraliz

    Remineraliz

    Remineraliz
    $10.08
  • Remineraliz-P

    Remineraliz-P

    Remineraliz-P
    $10.41