Already have a kit?

Microplastics test refill

Run one more in-home microplastics test. You get the two parts a test uses up — one staining vial and one syringe filter. Everything else from your kit gets reused.

One refill per test

Don't have a kit yet? Start with the full kit →

The Water Test kit — the refill replaces the vials and filters

What's in a refill

Each refill runs one test. One sample uses one staining vial and one syringe filter.

1× staining vials

One Nile Red vial per run — nothing to mix or measure

1× syringe filters

Fresh membrane per test — no rinsing, no carry-over

Nothing you already own

Reuse the tabletop microscope, syringe, membrane holder, wand, flashlight, and tweezers

Side by side: the KIT is the reusable hardware — tabletop digital microscope, syringe, membrane filter holder, wand, flashlight, tweezers, and amber vial. The TEST is one vial plus one filter, sealed in a bag, used up on a single sample.
The kit is the equipment and you buy it once. A test is one vial + one filter and gets used up on one sample.

Why people grab a refill

  • Re-test the same filter a few months later
  • Check the water after replacing a filter cartridge
  • Test a second source like the fridge, pitcher, or bottled water
  • Cheaper per test than buying another full kit

New to the test? See how it works