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Seachem Clarity Aquarium Water Clarifier 250 mL

Seachem Clarity 250 mL is a fast-acting aquarium water clarifier designed to help clear cloudy or hazy water in freshwater and marine aquariums. Clarity works by binding tiny suspended particles together so they can be more easily removed by mechanical filtration.

This aquarium clarifier is useful for cloudy water caused by substrate dust, detritus, bacterial blooms, uneaten food, and other fine particles that can make aquarium water look dull or unclear. It is suitable for freshwater community tanks, planted aquariums, saltwater systems, and reef aquariums when used as directed.

Key Benefits

  • Clears Cloudy Water: Helps remove haze caused by suspended particles and fine debris.
  • Improves Mechanical Filtration: Binds small particles together so filters can remove them more effectively.
  • Freshwater & Marine Safe: Suitable for freshwater, saltwater, planted, and reef aquariums.
  • Useful for New Tank Haze: Helps clear cloudiness from substrate disturbance, setup dust, or micro-debris.
  • Fast Acting Formula: Most aquariums begin clearing within several hours to 24 hours.
  • Safe for Biofiltration: Does not harm beneficial bacteria when used as directed.
  • Great Maintenance Product: Helpful after water changes, rescapes, substrate cleaning, or cloudy water events.

Product Details

  • Brand: Seachem
  • Product Name: Clarity
  • Size: 250 mL
  • Product Type: Aquarium water clarifier
  • Aquarium Type: Freshwater and marine aquariums
  • Best For: Cloudy aquarium water, bacterial blooms, substrate dust, new tank haze, fine debris, and routine maintenance

Best For

  • Cloudy aquarium water
  • New tank haze
  • Substrate dust
  • Light bacterial blooms
  • Suspended debris and micro-particles
  • Freshwater community tanks
  • Planted aquariums
  • Saltwater and reef aquariums
  • Water changes and aquarium maintenance

Directions for Use

Dose 5 mL per 20 gallons of aquarium water. Add directly to the aquarium and make sure mechanical filtration is operating properly. Repeat after 24 hours if necessary according to label directions.

For best results, use fine mechanical filtration, filter floss, polishing pads, or other mechanical media to help remove the particles that Clarity binds together.

Important Use Notes

  • Turn off UV sterilizers and ozone during treatment.
  • Keep mechanical filtration running.
  • Clean or replace filter floss and mechanical media as they collect debris.
  • Do not overdose.
  • Cloudiness caused by poor water quality should also be addressed with testing, water changes, and proper filtration.
  • Keep out of reach of children and pets.

Why Use Seachem Clarity?

Cloudy aquarium water can happen after setting up a new tank, disturbing substrate, cleaning decorations, overfeeding, or experiencing a bacterial bloom. Seachem Clarity helps clump tiny particles together so the aquarium filter can remove them from the water column.

Clarity is not a replacement for regular maintenance, water testing, or proper filtration, but it can be a helpful tool for restoring clearer water when fine particles are suspended in the aquarium.

Frequently Asked Questions

What causes cloudy aquarium water?

Common causes include bacterial blooms, substrate dust, uneaten food, detritus, disturbed gravel or sand, and suspended micro-debris.

Is Seachem Clarity safe for reef tanks?

Yes. Seachem Clarity is suitable for reef aquariums when used according to label directions.

Will Clarity harm beneficial bacteria?

No. Clarity does not harm beneficial bacteria when used as directed.

How quickly does Seachem Clarity work?

Many aquariums begin clearing within several hours, though some tanks may take up to 24 hours or need additional mechanical filtration maintenance.

Do I need to run a filter while using Clarity?

Yes. Mechanical filtration should be running so the filter can remove the particles that Clarity binds together.

Can I use Clarity in planted aquariums?

Yes. Clarity can be used in planted freshwater aquariums when used as directed.

Should I turn off my UV sterilizer?

Yes. Turn off UV sterilizers and ozone during treatment for best results.

Available at Tropical Treasures Wyo

Shop Seachem Clarity Aquarium Water Clarifier 250 mL online or in-store at Tropical Treasures Wyo in Cheyenne, Wyoming. This water clarifier is a useful product for cloudy freshwater tanks, saltwater aquariums, reef systems, planted tanks, new tank haze, substrate dust, bacterial blooms, and routine aquarium maintenance.


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