Cistern and Catchment Bomb™ Water Tank Cleaner Shock Treatment and Monthly Maintenance 500G

Stored water systems often develop slime, organic buildup, and unpleasant odors over time, especially in cisterns, catchment tanks, roofs, and gutters. This buildup can make water appear cloudy, smell unpleasant, and require heavy cleaning to reset the system. The SolutionsHOCL Cistern and Catchment Bomb™ is designed to handle both problems with one product.

Use a higher dose for a heavy-duty Shock Treatment when your tank needs a full reset, or use a lighter monthly maintenance dose once per month to help slow organic buildup from returning between shock cleans. One product, two use cases, dose-controlled by you.

Innovative Science for Superior Cistern and Catchment Tank Cleaning

At the heart of this formula is NaDCC (sodium dichloroisocyanurate), a stable compound that generates hypochlorous acid (HOCL) when dissolved in water. HOCL is a powerful oxidizing molecule widely studied for its ability to break down organic residues including proteins, fatty acids, amines, and sulfur compounds that accumulate on cistern and catchment tank surfaces. Whether used as a heavy shock dose or a light monthly maintenance dose, the same NaDCC-based HOCL chemistry targets organic residues at their source, helping reduce slime buildup, organic film, and odor-causing compounds on your water storage tank surfaces.

Shock Treatment and Monthly Maintenance From One Package

With the Cistern and Catchment Bomb, you control the treatment level by adjusting the number of 20g scoops per 1,000 gallons. Use 1 scoop per 1,000 gallons for a Light Maintenance dose as part of your routine monthly cistern care. Use 3 to 4 scoops per 1,000 gallons for a Standard Shock Treatment when your tank has visible slime or heavy organic buildup. Use up to 6 to 7 scoops per 1,000 gallons for a Very Heavy Shock when your tank has severe buildup that requires a full reset. The full Direction for Use table below shows every treatment level and its recommended scoop count.

Key Benefits of HOCL-Based Oxidation Technology

• Chemical Action:HOCL works through oxidation to help break down organic matter on cistern and catchment tank surfaces, reducing slime buildup and supporting cleaner water storage systems whether used for shock cleaning or monthly maintenance.
• Eco-Friendly Formula: NaDCC-based products naturally break down into salts and water after use, leaving minimal chemical residue in your water storage tank and reducing environmental impact compared to bleach-based alternatives.
• Versatile Single-Product System: one package serves both shock treatment and monthly maintenance needs. Dose higher for the initial heavy-duty reset. Dose lower each month to help slow organic buildup from returning. The resealable pouch (500G) lets you portion out multiple treatments from a single purchase.

Simple Steps for Maximum Impact

Using the Cistern and Catchment Bomb is straightforward regardless of dose level. Determine your tank volume, check the Direction for Use table for the appropriate scoop count based on your treatment goal, add the measured dose to your cistern or catchment tank water, allow contact time for the HOCL-based formula to work on organic film and residues on tank surfaces, then skim off any floating debris. No draining required.

Proven HOCL Chemistry for Both Shock and Maintenance Cistern Cleaning

Hypochlorous Acid (HOCL) is widely studied and referenced in environmental cleaning literature for its oxidizing properties. HOCL acts on organic compounds through oxidation, breaking them down more effectively than standard bleach-based alternatives while producing fewer residual byproducts. Visit our Scientific Studies page to explore published research on HOCL and its role in cleaning applications.

Easy to Use at Every Dose Level

Using the Cistern and Catchment Bomb is straightforward whether you are doing a full Shock Treatment or a routine monthly maintenance dose. Check the Direction for Use table for your treatment type and scoop count, add the measured dose to your tank water, allow contact time, then skim off any floating organic debris released from tank surfaces. No scrubbing and no draining required at any dose level.

HOCL-Based Cistern Cleaning for Long-Term System Care

Regular monthly maintenance doses after a Shock Treatment help reduce how often a full heavy-duty reset is needed. Each package comes in a resealable pouch with a measuring scoop. The 100G size is ideal for standard residential cisterns. The 500G value size is the best-value option for large cisterns, farm tanks, and multi-building rainwater storage systems.

This product is not NSF 60 Certified and is not EPA registered. It is sold as a cistern and catchment water tank cleaner, not as a disinfectant or sanitizer. This product is in the process of being submitted for EPA review, although not yet complete.