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.

Cistern & Catchment Bomb™ - Rainwater & Cistern Tank Cleaner -500G


Regular price $49.97
Free Shipping in All US States.

  • Keeping your cistern, catchment or rainwater tank clean is made easy. The Cistern & Catchment Bomb™ 500g makes it simple to clean tank surfaces and keep larger water storage tanks fresh with a powerful, eco-friendly drop-in cleaner.
  • Helps remove slimy film, algae stains, and organic buildup and neutralize odors through advanced oxidation
  • Helps keep tank surfaces cleaner and fresher over time
  • Easy drop-in formula, works while you wait, no manual scrubbing
  • Eco-friendly and biodegradable, gentle on tanks and the environment
  • Free Shipping across all 50 US Statesv
  • HOCL acts as an oxidizer to break down organic residue on tank surfaces and neutralize odors and stains at the source: proteins, fatty acids, amines, sulfur compounds, and more.

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Product Description

Keep your water storage tanks clean with our Cistern & Catchment Bomb™ Water Tank Cleaner in a convenient 500-gram pack. This powerful cleaner harnesses Hypochlorous Acid (HOCL) to break down organic residue and buildup on tank surfaces and neutralize odors and stains at the source, helping your cisterns and catchment tanks stay fresh.

Powerful Cleaning

Our formula releases HOCL, delivering a robust cleaner that is both effective and eco-friendly. The 500-gram pack is sized for larger tanks or systems that need regular maintenance.

Easy Application

Cleaning your water tank is straightforward with the Cistern & Catchment Bomb™. Follow the directions on the package, wait a few hours, and then remove any floating debris. This simple process helps keep your tank clean and fresh.

Note: Always follow safe handling and usage guidelines.

Proven Effectiveness and Reliability

HOCL is an effective, bleach-free cleaner. With regular use, you'll help remove organic buildup, reduce blockages, and keep tank surfaces cleaner longer.

Revive Your Tank the Easy Way with the SolutionsHOCL™ 500g Cistern & Catchment Bomb!

This concentrated cleaning bomb is designed to simplify maintenance and help support a fresher, clearer tank environment. Whether you're collecting rainwater or using stored water for off-grid use, this solution helps reduce unwanted odors, residue buildup, and discoloration over time.

Made with powerful yet gentle ingredients, it’s perfect for regular use without introducing harsh chemicals into your water system. Just drop it in and let it go to work-no scrubbing required!

Great for households, farms, cabins, or off-grid living—wherever you rely on stored water.

Safety and Usage Information

Warning

  • Keep out of reach of children.
  • Avoid contact with eyes and skin.
  • Not for direct consumption or application on food.
  • Store in a cool, dry place away from direct sunlight.

First Aid

  • If in eyes: Rinse cautiously with water for several minutes. Seek medical attention if irritation persists.
  • If on skin: Wash with soap and water. If irritation occurs, discontinue use and consult a physician.
  • If swallowed: Do not induce vomiting. Rinse mouth and seek medical advice immediately.
  • Package Size

    500 grams

  • Form
    Fine Powder + Granules
  • Ingredients
    Sodium dichloroisocyanurate (NaDCC). Releases HOCL when added to water.
  • Compatibility

    Will not harm common tank liner materials including EPDM, PVC, polyethylene, polypropylene, and fiberglass / Great for gutters and roofs

  • Dosage

    20 grams per 1,000 gallons of water.

  • Shelf Life

    1–2 years

  • Made In
    USA

Cistern & Catchment Cleaner: Keep Your Tank Fresh and Clean

Effectively clean and maintain your cistern and catchment systems with our easy-to-use cleaner. Designed to remove buildup and neutralize odors at the source, it helps keep tank surfaces clean while protecting your storage tanks for long-lasting performance.

solutions hocl is superior to bleach
Woman pouring a product from a bag into a large metal tank with 'ECO Friendly Solutions HOCL'

How Removing Proteins, Fatty Acids & Odors Keeps Your Tank Fresh

Compounds Neutralized:

  • Proteins (from leaf litter, insects, bird droppings)
  • Fatty acids (from environmental runoff)
  • Amines (from decaying organic matter)
  • Sulfur compounds (from decomposing natural material)

What Happens If Not Neutralized:
These compounds create slime, slimy film, and unpleasant odors, leading to rapid tank fouling.

Product Benefits:
By neutralizing and breaking down these organics, Cistern & Catchment Bomb™:

  • Reduces odor and slimy buildup in tanks and pipes
  • Prolongs intervals between deep cleaning
  • Helps keep the tank interior fresher smelling
cistern & catchment bomb eco-friendly for rainwater tanks

Eco-Friendly Water Tank Cleaner for Cisterns & Rainwater Catchment Systems

The SolutionsHOCL™ Cistern & Catchment Bomb™ is a powerful, eco-conscious cleaner for your water storage tanks. Powered by Hypochlorous Acid (HOCL), it breaks down organic residue and buildup on tank surfaces, helping your cisterns and catchment tanks stay fresh and odor-free.

Works perfect on Your Cistern & Catchment Tanks


Clean your catchment and cistern tank with HOCL. We formulate our SolutionsHOCL™ Crystals with HOCL. Read more on our  Scientific Studies Page

Why Tank Cleaners Love It

  • no scrubing required for cleaning water storage tanks

    No Scrubbing Needed

    The formula does the heavy lifting. Simply add, wait, and rinse.

  • solutions hocl (hypochlorous acid) long lasting cleaners

    Long-Lasting Effects

    Helps keep tank surfaces cleaner longer and reduces the frequency of deep cleaning.

  •  Water Storage Systems

    Tank Compatible

    Compatible with most cistern materials, including plastic, concrete, and metal tanks.

  • solutions hocl ph friendly cleaners

    Neutral pH

    Balanced formula that is gentle on tank surfaces and fittings.

  • solutions hocl (hypochlorous acid) cleaners travel friendly

    Compact & Portable

    Easy to store and use for regular maintenance or emergency cleaning.

cistern & catchment bomb best cleaning formula clean water collection system

SolutionsHOCL™ Cleaning Formulas

Our cleaning formulas feature Hypochlorous Acid (HOCL) as a key component, breaking down organic residue and neutralizing odors and stains at the source through oxidation. Visit our Scientific Studies page.

Our SolutionsHOCL™ products are formulated with environmentally friendly ingredients and come with a 100% Satisfaction Guarantee! Please take the time to review our full line of Home Healthy™ Cleaning Products.

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start cleaning water storage tanks with cistern & Catchment bomb

Your Cleaner Tank Starts Here

Choose a smarter, simpler way to maintain your cistern and catchment system. Made for homeowners and off-grid users alike, our cleaner is your go-to for a fresher, odor-free tank, without harsh chemicals or complicated steps.

Frequently Asked Questions

What is HOCL and How Does It Function as a Water Tank Cleaner?

HOCL stands for hypochlorous acid. It is an effective and powerful cleaner used to keep water tanks clean. HOCL is a naturally occurring compound that helps break down organic residue and buildup on tank surfaces, making it very effective for cleaning.

What exactly is the Cistern & Catchment Bomb?

The Cistern & Catchment Bomb is a powerful cleaning solution designed to maintain and refresh your rainwater catchment or cistern system. It breaks down organic buildup, neutralizes odors, and helps keep your tank cleaner and fresher, without harsh chemicals or scents.

How often should I use the Cistern & Catchment Bomb?

For best results, use the Bomb once every 1-2 months, or after heavy rainfall when sediment and organic debris are likely to accumulate. Regular use helps maintain ongoing freshness in your system.

Will it damage my tank or plumbing system?

Not at all. The formula is gentle on your cistern or tank material, pipes, and seals. It will not harm common tank materials including plastic, metal, and concrete. No corrosion, no residue, just a cleaner tank interior.

Do I need to scrub or rinse my tank after use?

No scrubbing needed. Follow the directions on the package and the formula will do the hard work for you. For deep cleaning, we recommend a full flush and refill.

Is it safe for the environment?

Yes! Our formula is biodegradable, bleach-free, and environmentally responsible.

Will this help with odors from my tank?

Yes! One of the main benefits of the Cistern & Catchment Bomb is odor control. It helps neutralize musty smells, algae-related odors, and other unpleasant scents at the source, caused by organic buildup.

Does this product expire?

The Bomb has a shelf life of up to 2 years when stored in a cool, dry place. We recommend keeping it sealed and away from direct sunlight to preserve maximum effectiveness.

How does SolutionsHOCL™ clean up your Cistern or Catchment Tank?

Simply follow the directions on the package, wait a few hours, and then scoop out any floating organic matter. This process helps maintain the cleanliness of your water tank. Experience the power of HOCL Cistern & Catchment Water Tank Cleaner and keep your tank clean.