Eco-Friendly HOCL Tank Cleaner. Bleach-Free. Made in Hawaii.

Powerful Eco-Friendly Deep Cleaner.   Bleach-free. Made in Hawaii. Free Shipping All 50 States.

Breaks Down Contaminant Buildup and Neutralizes Odors. No Harsh Chemicals.

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SolutionsHOCL™ Cistern Tank Cleaners

Maintain a clean and odor-free cistern tank with our easy-to-use, eco-friendly cleaner. Designed for all types of cistern tanks, this powerful bomb cleaner helps break down organic buildup, reduce unpleasant odors, and keep your water storage system fresher for longer. No scrubbing, no harsh chemicals, just drop it in and let it work.

Cistern Bomb™, Natural Cistern Tank Cleaner (Bleach-Free Formula)

Keep your cistern tank clean, fresh, and odor-free with the Cistern Bomb™, a bleach-free solution that works through natural oxidation. Whether you're doing monthly maintenance or a full deep clean, it helps reduce slime, odors, and buildup without harsh chemicals.

Order Cistern Bomb™ now and keep your cistern tank clean, naturally, no bleach needed.

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Deep Cleaning Removes Buildup, Odors, and Residue From Water Tanks

If you rely on water tanks for household use, gardening, rainwater harvesting, or emergency storage, then maintaining clean, clear water is important. The SolutionsHOCL Cistern Bomb Cleaner is designed to help you do exactly that, with science-backed, eco-friendly ingredients that deep-clean without harsh chemicals.

Using the natural cleaning power of Hypochlorous Acid (HOCL), the same molecule your immune system produces, this bomb cleaner helps clean your cisterns from the inside out.

Not Just a Cleaner, a Smarter Sanitation Solution

While bleach and harsh chemical cleaners leave behind residues and foul odors, the SolutionsHOCL Cistern Bomb Cleaner works differently.

Why Cistern Bomb Works: Simple, Powerful Cleaning

  • Hypochlorous Acid (HOCL)

    A powerful yet naturally occurring cleaning agent that mimics your body's natural defenses. It helps break down organic buildup and residue without leaving harsh residue behind.

  • Bleach-Free Cleaning

    Cleans without bleach, corrosive ingredients, or harsh fumes. You get a powerful result without the smell or the residue that comes with chlorine bleach.

  • Gentle on Tanks and Liners

    Compatible with plastic, concrete, fiberglass, and metal tanks. It works on surfaces, liners, and pipes without corroding your system or leaving buildup behind.

  • Long-Lasting Freshness

    One treatment keeps water fresher for weeks, even in stagnant or low-use systems. Less frequent cleaning, with results you can see and smell.

  • Eco-Friendly and Biodegradable

    Breaks down into simple compounds after use and is gentle for your home, garden, and the environment. A responsible choice for rainwater and storage tanks.

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Say Goodbye to Smelly, Slimy Tanks

The SolutionsHOCL Cistern Bomb Cleaner is your go-to solution for clean, odor-free, and buildup-resistant water tanks. Whether you're prepping for an emergency or just want better household water, our HOCL-powered bomb has you covered.

Backed by Research, Powered by Nature


The key ingredient, Hypochlorous Acid (HOCL), is a naturally occurring compound produced by the body's own white blood cells. When used in water cleaning, it helps break down organic buildup and residue without leaving harsh residue.

Verified in Over 55 Scientific Studies

Our cleaner is science-backed. Explore our Scientific Studies page to see independent research on the stability and performance of HOCL.

The People First Choice for Cleaning Cistern Tanks

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    HOCL Power

    Harnesses the natural cleaning force of Hypochlorous Acid, effective and biodegradable.

  • Eco-Friendly & Biodegradable

    Genrle & Eco-Friendly

    Gentle for your home, garden, and the planet. Breaks down into simple compounds after use.

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    Deep Cleaning Action

    Penetrates tough grime, lifts buildup, and reduces odor, without damaging your tank system.

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    Long-Lasting Results

    One treatment offers protection and freshness that can last for weeks in stagnant or low-use systems.

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    Trusted & Researched

    Backed by 50+ scientific studies. HOCL is referenced by the World Health Organization (WHO) in water treatment applications.

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    Versatile Applications

    Ideal for homes, farms, RVs, emergency tanks, catchment systems, and more.

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    Satisfaction Guaranteed

    We stand behind our formula — with a 100% satisfaction promise.

Everything You Need to Know About Cistern Cleaning

General Questions

What is the SolutionHOCL Cistern Bomb Cleaner?

It’s a powerful, eco-friendly cleaner specially formulated to deep-clean water cisterns and tanks using Hypochlorous Acid (HOCL). It helps reduce organic buildup, stains, and odor effectively.

Is this cleaner compatible with all types of water tanks?

Yes! It's compatible with plastic, concrete, fiberglass, and metal cisterns. Just follow the usage instructions for best results.

Can I use this cleaner if I store drinking water?

Our formula is biodegradable and breaks down into simple compounds after cleaning. This product is designed for non-potable water systems; if your tank is later used for potable water, rinse thoroughly and follow your local water-safety guidance.

Does it work in cold water?

Yes! The Solutions HOCL Cistern Tank Cleaner works effectively in cold water. It dissolves completely and starts working immediately, even in very cold conditions — no heating required.

How much should I use?

Use 1 scoop per 1,000 gallons of water. A 100-gram pack treats up to 5,000 gallons total and includes a measuring scoop for accuracy.

How long does it take to see results?

You’ll notice clearer water and reduced odors within hours. Full results, including grime and slimy film removal, typically appear within a few days.

Why choose it for cleaning water tanks?

It's HOCL-powered, helping lift stains and odor effectively without harsh chemicals. It's fast-acting, suitable for water systems, and ideal for year-round use, even in winter.

Effectiveness & Ingredients

What makes HOCL different from bleach?

HOCL is a naturally occurring cleaning compound that works without the harsh fumes or residue of bleach. It cleans deeply and breaks down gently

Does it help with buildup and stains?

Yes. It helps break down organic buildup and residue commonly found in tanks, especially in humid environments.

Are the ingredients eco-friendly?

Yes! The cleaner is powered by HOCL (hypochlorous acid) and is designed with eco-conscious, biodegradable cleaning in mind.

Usage & Application

How do I use the Cistern Bomb Cleaner?

Simply drop the tablet into the tank, allow it to dissolve, and let it sit for a few hours. Then rinse or drain depending on usage. Full directions are provided on the packaging.

How often should I use this cleaner?

We recommend deep cleaning your tank every 2 to 3 months for optimal performance. In humid or tropical climates, monthly use may be ideal.

Can I use it for my RV or boat water tank?

For best results, we recommend using our RV Tank Cleaner for RVs Tanks and Marine & Boat Tank Cleaner for boats & Marine Tanks. Our Cistern Tank Cleaner is specially designed for larger water storage systems like cisterns and catchment tanks.

Safety & Storage

What precautions should I take around pets and kids?

Keep undissolved tablets out of reach of children and pets, and follow the usage and rinsing instructions on the packaging.

How should I store the product?

Store in a cool, dry place away from direct sunlight. The tablets are shelf-stable and long-lasting.

Does it leave any strong smells?

No. Unlike bleach-based products, it leaves no lingering odors. Just clean, fresh water.