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Early Access To Black Friday Deals + Free Salt Mix With Orders Over $399 - Learn More

Early Access To Black Friday Deals + Free Salt Mix With Orders Over $399 - Learn More

Aperture Business New Website Reminder

We are now transitioning all ordering of Neptune Systems, EcoTech Marine, AquaIllumination, Bulk Reef Supply Wholesale, and all of our Aperture Exclusive Distribution Brands to the new Aperture Business website (aperturebusiness.com).

If we have not yet moved your account, we need your basic information to complete that transition.

Please Complete This Form

Please complete the form linked above as soon as possible to get started.

If you have any questions, please contact your Aperture sales representative.

Test Kits

Ensure long-term reef tank stability and healthy, colorful coral success with advanced test kits and monitoring tools. Explore precision pH, calcium, alkalinity, nitrate, phosphate, and multi‑parameter test kits from trusted reefing brands.
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143 Items

  1. Refractometer for Reading Salinity with Calibration Fluid
    474 Reviews
    Bulk Reef Supply
    Refractometer for Reading Salinity with Calibration Fluid
    $33.29 $33.29

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  2. HI98319 Marine Salinity Tester
    68 Reviews
    Hanna Instruments
    HI98319 Marine Salinity Tester
    $99.99 $99.99

  3. MA887 Digital Seawater Refractometer - Milwaukee
    139 Reviews
    Milwaukee Instruments
    MA887 Digital Seawater Refractometer - Milwaukee
    $175.00 $175.00

  4. BRS Master Test Kit Bundle
    3 Reviews
    Bulk Reef Supply
    BRS Master Test Kit Bundle
    $199.99 $199.99

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  5. Thomas' Favorite Test Kits Bundle
    2 Reviews
    Bulk Reef Supply
    Thomas' Favorite Test Kits Bundle
    $279.99 $279.99

    View Details
  6. RedSea Marine Care Test Kit
    41 Reviews
    Red Sea
    RedSea Marine Care Test Kit
    $79.99 $79.99

  7. RedSea Reef Foundation Pro Multi Test Kit (Ca, Alk, Mg)
    199 Reviews
    Red Sea
    RedSea Reef Foundation Pro Multi Test Kit (Ca, Alk, Mg)
    $79.99 $79.99

  8. RedSea Algae Control Multi Test Kit (NO3/PO4)
    43 Reviews
    Red Sea
    RedSea Algae Control Multi Test Kit (NO3/PO4)
    $79.99 $79.99

  9. Marine Master Bluetooth Multiparameter Photometer HI97115
    10 Reviews
    Hanna Instruments
    Marine Master Bluetooth Multiparameter Photometer HI97115
    $499.99 $499.99

  10. HIREEF2 Professional Reef Test Kit
    3 Reviews
    Hanna Instruments
    HIREEF2 Professional Reef Test Kit
    $329.99 $329.99

  11. Marine Coral Care Test Kit
    Hanna Instruments
    Marine Coral Care Test Kit
    $194.99 $194.99

  12. Marine Algae & Nutrient Management Test Kit
    Hanna Instruments
    Marine Algae & Nutrient Management Test Kit
    $169.99 $169.99

  13. Alkalinity DKH Colorimeter HI772 Hanna Checker - Marine Water
    116 Reviews
    Hanna Instruments
    Alkalinity DKH Colorimeter HI772 Hanna Checker - Marine Water
    $74.99 $74.99

  14. HI772-26 Alkalinity Checker Reagents - Hanna
    36 Reviews
    Hanna Instruments
    HI772-26 Alkalinity Checker Reagents - Hanna
    $18.99 $18.99

  15. Nitrate High Range Colorimeter HI782 - Marine Water
    37 Reviews
    Hanna Instruments
    Nitrate High Range Colorimeter HI782 - Marine Water
    $74.99 $74.99

  16. HI782-25 Nitrate HR Checker Reagents - Hanna
    8 Reviews
    Hanna Instruments
    HI782-25 Nitrate HR Checker Reagents - Hanna
    $26.99 $26.99

  17. Phosphate Ultra Low Range PPM Colorimeter HI774 Hanna Checker - Marine Water
    32 Reviews
    Hanna Instruments
    Phosphate Ultra Low Range PPM Colorimeter HI774 Hanna Checker - Marine Water
    $74.99 $74.99

  18. HI774-25 Phosphate ULR Reagents - Marine Water
    7 Reviews
    Hanna Instruments
    HI774-25 Phosphate ULR Reagents - Marine Water
    $18.99 $18.99

  19. Marine Magnesium Colorimeter HI783
    18 Reviews
    Hanna Instruments
    Marine Magnesium Colorimeter HI783
    $74.99 $74.99

  20. HI783-25 Marine Magnesium Reagents (25 Pack)
    Hanna Instruments
    HI783-25 Marine Magnesium Reagents (25 Pack)
    $25.99 $25.99

  21. Calcium Colorimeter HI758 Hanna Checker - Marine Water
    164 Reviews
    Hanna Instruments
    Calcium Colorimeter HI758 Hanna Checker - Marine Water
    $74.99 $74.99

  22. HI758-26 Calcium Checker Reagents - Marine Water
    21 Reviews
    Hanna Instruments
    HI758-26 Calcium Checker Reagents - Marine Water
    $34.99 $34.99

  23. Trident - Marine Aquarium Water Analyzer
    83 Reviews
    Neptune Systems
    Trident - Marine Aquarium Water Analyzer
    $699.99 $699.99

  24. 2-Month Trident Reagent Kit
    1 Review
    Neptune Systems
    2-Month Trident Reagent Kit
    $49.99 $49.99

  25. 6-Month Trident Reagent Kit
    18 Reviews
    Neptune Systems
    6-Month Trident Reagent Kit
    $109.99 $109.99

  26. Trident NP Nitrate & Phosphate Tester w/ 2 Month Reagent Kit
    13 Reviews
    Neptune Systems
    Trident NP Nitrate & Phosphate Tester w/ 2 Month Reagent Kit
    $729.98 $729.98

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  27. 2-Month Trident NP Reagent Kit
    Neptune Systems
    2-Month Trident NP Reagent Kit
    $59.99 $59.99

  28. Trident NP Waste Container
    Neptune Systems
    Trident NP Waste Container
    $5.99 $5.99

  29. Reef Master Test Kit
    1 Review
    API
    Reef Master Test Kit
    $35.98 $35.98

  30. Saltwater Liquid Master Test Kit
    5 Reviews
    API
    Saltwater Liquid Master Test Kit
    $35.98 $35.98

  31. ATI ICP-OES Pro Water Analysis
    4 Reviews
    ATI
    ATI ICP-OES Pro Water Analysis
    $44.95 $44.95

  32. 1-Pack ICP-OES Testing Kit
    12 Reviews
    Triton
    1-Pack ICP-OES Testing Kit
    $49.00 $49.00

  33. 3-Pack ICP-OES Testing Kit
    Triton
    3-Pack ICP-OES Testing Kit
    $141.00 $141.00

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  34. 6-Pack ICP-OES Testing Kit
    Triton
    6-Pack ICP-OES Testing Kit
    $270.00 $270.00

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  35. High Precision Hydrometer
    37 Reviews
    Tropic Marin
    High Precision Hydrometer
    $40.31 $40.31

  36. Marine Monitor (pH/Salinity/Temperature)
    8 Reviews
    Hanna Instruments
    Marine Monitor (pH/Salinity/Temperature)
    $299.99 $299.99

  37. Salifert kH/Alkalinity Aquarium Test Kit
    85 Reviews
    Salifert
    Salifert kH/Alkalinity Aquarium Test Kit
    $17.99 $17.99

  38. Salifert Calcium Aquarium Test Kit
    113 Reviews
    Salifert
    Salifert Calcium Aquarium Test Kit
    $20.99 $20.99

  39. Salifert Magnesium Aquarium Test Kit
    73 Reviews
    Salifert
    Salifert Magnesium Aquarium Test Kit
    $21.99 $21.99

  40. Salifert Nitrate Aquarium Test Kit
    39 Reviews
    Salifert
    Salifert Nitrate Aquarium Test Kit
    $18.99 $18.99

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