Best Cistern & Rainwater Catchment Tank Cleaner - Natural HOCL Formula

HOCL stands for hypochlorous acid, a naturally occurring oxidizing compound used in cleaning chemistry. The cleaning industry produces it through controlled processes using salt, water, and electricity.

How HOCL cleans water tanks:

• Breaks down contaminant buildup: HOCL works as an oxidizing agent on films, residue, and deposits on tank surfaces.
• Gentle and residue-free: Unlike bleach, HOCL does not leave harsh chemical residues, so the tank is ready for use again.
• No strong odors: HOCL does not produce strong smells or harsh fumes.
• Easy application: Add it to the tank, where it disperses and goes to work on the walls and surfaces.
• Drain and refill: After cleaning, drain the tank and refill with fresh water before use.

How HOCL compares to bleach:

• Better for the environment: HOCL does not produce harsh chemical fumes.
• Protects tank materials: It does not cause the corrosion or degradation that bleach can.
• Helps clean algae odor and stains: HOCL's oxidizing action helps break down the film and residue that leave odor and staining behind.
• Cost-effective: A small amount cleans a large tank.
• Cleaner surfaces: HOCL breaks down without leaving chemical residues.

SolutionsHOCL products are not EPA-registered and are not sold for disinfection, sanitization, or sterilization purposes. They are formulated as cleaning products for surface cleaning, residue removal, and odor neutralization.

Yes. The Cistern & Catchment Bomb is a bleach-free cleaner built around hypochlorous acid (HOCL), a naturally occurring oxidizing compound. It's made with environmentally friendly ingredients and leaves no harsh chemical residues. For the full ingredient disclosure, see the product label and the product page.

EPDM (Ethylene Propylene Diene Monomer) Liners

• Why Avoid Bleach? Bleach can oxidize and degrade EPDM rubber, leading to brittleness and leaks.
• Recommended Cleaning Method:
• Product: Use SolutionsHOCL™ Cistern & Catchment Bomb.
• Application: Dilute the product as per instructions and apply it to the interior surfaces of the tank. Allow it to sit for the recommended time to break down contaminant buildup and deposits.
• Rinse: Thoroughly rinse with clean water to remove any residual cleaner.

PVC (Polyvinyl Chloride) Liners

• Why Avoid Bleach? Bleach can cause hardening and cracking of PVC over time.
• Recommended Cleaning Method:
• Product: Utilize SolutionsHOCL™ Cistern & Catchment Bomb.
• Application: Apply the diluted solution to the interior surfaces and allow adequate contact time to break down buildup and deposits.
• Rinse: Ensure all cleaning residues are rinsed away with fresh water.

Polyethylene (LDPE & HDPE) Liners

• Why Avoid Bleach? Low-density polyethylene (LDPE) can degrade with bleach exposure, while high-density polyethylene (HDPE) may resist but is not immune to damage.
• Recommended Cleaning Method:
• Product: Opt for SolutionsHOCL™ Cistern & Catchment Bomb.
• Application: Apply the diluted solution to the interior surfaces, allowing adequate contact time to break down contaminant buildup and deposits.
• Rinse: Flush the tank with clean water to remove any remaining cleaner.

Polypropylene (PP) Liners

• Why Avoid Bleach? Bleach can lead to discoloration and embrittlement of polypropylene.
• Recommended Cleaning Method:
• Product: Employ SolutionsHOCL™ Cistern & Catchment Bomb.
• Application: Use the product as directed on the interior surfaces, allowing adequate contact time to break down contaminant buildup and deposits.
• Rinse: Rinse thoroughly with potable water to ensure no cleaner remains.

Butyl Rubber Liners

• Why Avoid Bleach? Similar to EPDM, bleach can deteriorate butyl rubber, compromising its flexibility and integrity.
• Recommended Cleaning Method:
• Product: Choose SolutionsHOCL™ Cistern & Catchment Bomb.
• Application: Apply the diluted cleaner to the interior surfaces, allowing adequate contact time to break down contaminant buildup and deposits.
• Rinse: Completely rinse the tank with clean water to remove any cleaner residue.

Fiberglass (Gel-Coated) Liners

• Why Avoid Bleach? Bleach can erode the gel coating, leading to absorption of chemicals and structural degradation.
• Recommended Cleaning Method:
• Product: Apply SolutionsHOCL™ Cistern & Catchment Bomb.
• Application: Apply the diluted solution to the interior surfaces, focusing on areas with visible staining or buildup, and allow adequate contact time.
• Rinse: After cleaning, rinse the tank thoroughly to ensure all residues are removed.

Over 44 million Americans depend on private wells, rainwater tanks, and water storage systems for their daily water needs. Keeping these systems clean supports reliable water storage when city water is not available.

Over time, water tanks can gather sediment, contaminant buildup, and debris that affect tank cleanliness and cause odors. Regular cleaning helps maintain a cleaner tank environment for household water storage.

Our eco-friendly formula makes tank cleaning easy. Using natural oxidation and eco-friendly ingredients, it dissolves contaminant buildup and keeps your tank clean without harsh chemicals.

Yes. Our tank cleaner is formulated from eco-friendly ingredients, designed to be effective for your tank and the environment, without harsh chemicals.

What it does: Add 1 scoop (20 grams) per 1,000 gallons of tank capacity. The formula releases HOCL, a naturally occurring oxidizing compound.

How it functions: HOCL works through natural oxidation to help break down contaminant buildup, film, and residue on tank walls and surfaces. This helps reduce odors and slime that accumulate over time.

Easy process: After 30 to 60 minutes of contact time, the loosened contaminants lift off the walls. Drain the tank to carry it out, then rinse and refill.

Eco-conscious choice: The formula is made with environmentally friendly ingredients and leaves no harsh chemical residues.

Technical overview:

• Dose: 1 scoop (20 grams) per 1,000 gallons of tank capacity.
• The sodium-based ingredient undergoes hydrolysis in water to release HOCL, creating a neutral-pH solution that optimizes HOCL's oxidative cleaning properties compared to bleach (NaOCl), which becomes less effective at higher pH.
• Oxidation: HOCL functions as an oxidizing agent that helps break down contaminant buildup on tank surfaces. Represented simply as HOCL plus organic film yields oxidized compounds plus water.
• Odor and stain management: HOCL helps oxidize the compounds that leave odor and staining behind.
• After cleaning, drain and refill. HOCL naturally breaks down into chloride ions and water. No harsh chemical residues remain.

Yes! We ship to all 50 states. Free shipping on orders over $50. Most orders arrive within 3-5 business days.

Absolutely. Our formula works in all climates from hot Texas summers
to cold Montana winters. Effective in temperatures from 40°F to 100°F.

Yes! Perfect for off-grid living. Works in catchment systems, cisterns, and water storage tanks commonly used on ranches, cabins, and homesteads throughout the USA.