Cistern & Catchment Bomb™ - Rainwater & Cistern Tank Cleaner -500G
Product Description
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 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 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 tank. 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 harsh chemicals. Follow the directions on the package, no scrubbing required.
Great for households, farms, cabins, or off-grid living—wherever you rely on stored water.
This is a cleaning product for tank walls and surfaces, for use in non-potable water systems.
Safety and Usage Information
Safety and Usage Information
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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.

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 plant material)
- 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 compounds, Cistern & Catchment Bomb™:
- Reduces odor and slimy buildup in tanks and pipes
- Prolongs intervals between deep cleaning
- Helps keep the tank interior fresher smelling
4 Steps to Clean Your Dirty Tank
1
FILL THE TANK
Make sure the tank is full enough to cover all areas that need cleaning.
2
Add the Powder
Add one scoop per 1,000 gallons of tank capacity.
3
Let it Work
Wait one hour or more, depending on the condition of the tank.
4
DRAIN & REFILL
Once the tank is clear, drain and refill. Ready to use.

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 contaminant residue and buildup on tank surfaces, helping your cisterns and catchment tanks stay fresh and odor-free.
Works perfectly on Your Cistern & Catchment Tanks
Clean your catchment and cistern tank with HOCL. We formulate our SolutionsHOCL™ granules with HOCL. Read more on our About HOCL page.
Why Tank Cleaners Love It

SolutionsHOCL™ Cleaning Formulas
Our cleaning formulas feature Hypochlorous Acid (HOCL) as a key component, breaking down contaminant residue and neutralizing odors and stains at the source through oxidation.
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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Frequently Asked Questions
What is HOCL and How Does It Function as a Water Tank Cleaner?
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 surfaces clean. HOCL use powerful deep cleaning oxidation technology that helps break down residue and buildup on tank surfaces, making it very effective for cleaning.
What exactly is the Cistern & Catchment Bomb?
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 contaminant buildup residue, odors, and helps keep your tank clean bleach-free.
How often should I use the Cistern & Catchment Bomb?
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 debris are likely to accumulate. Regular use helps maintain ongoing cleaning in your system.
Will it damage my tank or plumbing 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.
Why does this say "non-potable water systems"?
Why does this say "non-potable water systems"?
Cistern & Catchment Bomb™ is a cleaning product for the tank itself, not a water treatment. You fill the tank enough to cover the surfaces being cleaned, add the powder, let it work, then drain and refill with fresh water. The water used during cleaning is drained out, not kept. Follow the directions on the package.
Do I need to scrub or rinse my tank after use?
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 environmentally friendly?
Is it environmentally friendly?
Yes! Our formula is eco-friendly, bleach-free, and phosphate-free.
Will this help with odors from my tank?
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 contaminant buildup.
Does this product expire?
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?
How does SolutionsHOCL™ clean up your Cistern or Catchment Tank?
Simply follow the directions on the package, wait a few hours, and then drain and refill. This process helps maintain the cleanliness of your tank. Experience the power of HOCL Cistern & Catchment Water Tank Cleaner and keep your tank clean.








