Seachem Pristine - Natural Aquarium Cleaner & Waste Eliminator

Break down aquarium sludge the natural way.

Leftover food, fish waste, and organic debris quietly build into sludge that clouds the water, creates odors, and stresses your fish — no matter how often you clean.

Seachem Pristine uses powerful, naturally occurring bacteria to digest that stubborn organic waste and sludge, restoring clarity and a healthy balance to the tank. With regular use it improves water clarity, reduces odors, and lightens your maintenance load — safely, in fresh and salt water, for fish, plants, and invertebrates.

Seachem Laboratories has been a chemistry-driven company since 1979, developing its treatments in-house in Madison, Georgia. Pristine reflects that biology-led approach: a carefully selected blend of naturally occurring bacteria chosen to break down waste effectively and safely across freshwater and marine systems.

1. Shake well before use.
2. Add 1 capful (5 mL) per 40 L (10 US gallons) weekly, or as needed.
3. For heavily soiled aquariums, dose more frequently until clarity improves.

Clear the sludge, keep the balance. Add to cart.

Why Seachem Pristine

• Powerful waste digestion: naturally occurring bacteria break down sludge and organic debris that ordinary cleaning leaves behind.
• Concentrated dosing: a single 5 mL capful treats 40 L (10 US gallons), so a small weekly dose maintains a clean, clear tank.
• Gentle and non-disruptive: a biological cleaner that works with your tank rather than dosing harsh chemistry into it, safe for fish, plants, and invertebrates.
• Works with your system: effective in both freshwater and saltwater aquariums and complements the wider Seachem maintenance range.

Best For

Ongoing maintenance of freshwater and marine aquariums where organic waste, sludge, and odors accumulate — and heavily soiled tanks that need help restoring clarity.

Directions

Shake well before use. Add 1 capful (5 mL) per 40 L (10 US gallons) weekly or as needed. For heavily soiled aquariums, dose more frequently until clarity improves. Safe for freshwater and saltwater aquariums, fish, plants, and invertebrates.

FAQ

How much Pristine do I use?
Add 1 capful (5 mL) per 40 L (10 US gallons) weekly, or more frequently for heavily soiled tanks until clarity improves.

Is Pristine safe for planted and reef tanks?
Yes. It's safe for freshwater and saltwater aquariums, fish, plants, and invertebrates.

Does Pristine replace water changes?
No. It digests organic waste and sludge to keep water clearer and reduce maintenance, but it works alongside your normal water-change routine rather than replacing it.