Seachem Clarity – Reef- & Plant-Safe Aquarium Water Clarifier

Turn cloudy water crystal clear — in one dose.

Hazy, cloudy water makes even a healthy tank look neglected, and most clarifiers only tackle one type of cloudiness or one kind of tank.

Seachem Clarity is the all-in-one clarifier for fresh and salt water, using an advanced polymeric flocculant that's reef- and plant-safe. It clumps together the tiny particles behind every type of cloudiness so your mechanical filter can trap them — clearing the water in 1–2 hours.

Seachem Laboratories has engineered water treatments in-house since 1979, and Clarity shows it: rather than a single-purpose additive, its chemists combined both precipitating and flocculating agents in one concentrated, filter-safe bottle that tackles every kind of cloudiness.

1. Make sure your filter has mechanical media (e.g. filter floss).
2. Dose 5 mL (1 capful) per 80 L (20 gallons).
3. A brief haze means it's working — clean the floss once the tank clears.

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Why Seachem Clarity

• Clears every kind of cloudiness: combines precipitating and flocculating agents to handle particulate, bacterial, and general haze in one bottle.
• Fast-acting and concentrated: one 5 mL capful treats 20 gallons and clears water in roughly 1–2 hours.
• Reef- and plant-safe: a gentle polymeric flocculant safe for delicate freshwater and marine systems alike.
• Works with your filter: designed to clump particles for your existing mechanical media to capture — no special equipment needed.

Best For

Clearing cloudy or hazy water in freshwater, marine, and reef tanks — after setup, a water change, gravel disturbance, or a bacterial bloom.

What It Does

Clears all types of cloudiness in all environments (freshwater, marine, reef) using both precipitating and flocculating agents in one bottle. Reef- and plant-safe. Requires mechanical filtration to remove the clumped particles.

Directions

Use 1 capful (5 mL) for every 80 L (20 US gallons). Cloudiness may briefly increase after dosing — this is normal and means Clarity is working. Rapid clarification follows (1–2 hours). Clean filter floss or cartridge after the tank clears.

Available Sizes

100 mL, 250 mL, 500 mL, 2 L, 4 L

FAQ

How much Clarity do I use per gallon?
Use 5 mL (1 capful) for every 20 US gallons (80 L).

Why did my water get cloudier after dosing?
That's normal. Clarity clumps fine particles together before your filter removes them, so a brief increase in haze means it's working. The tank clears in about 1–2 hours.

Is Clarity safe for reef tanks and planted tanks?
Yes. Clarity is reef- and plant-safe and works in both freshwater and marine systems. Make sure your filter has mechanical media to capture the clumped particles.