Removing algae from an RV fresh water tank requires sanitizing the system with a diluted bleach or vinegar solution.
Algae is removed by draining the tank and sanitizing it with a diluted bleach solution or high-concentration vinegar. After scrubbing visible growth through access ports, the system must be flushed repeatedly with fresh water until the cleaning agent odor is gone to ensure the water is safe for use.
Step-by-Step Sanitization Process
- Empty the plumbing system: Open all low-point drains and the water heater pressure relief valve to remove all old, contaminated water from the vehicle.
- Prepare the sanitizer: Mix the cleaning agent in a separate container before pouring it into the tank. A standard ratio is one-quarter cup of bleach per fifteen gallons of tank capacity.
- Engage the pump: Turn on all hot and cold faucets until you can smell the cleaning agent. This ensures the entire plumbing line, not just the tank, is treated.
- Soak the system: Let the solution sit in the tank and lines for 4 to 12 hours. This duration allows the agent to break down organic matter and kill remaining spores.
- Final flush: Drain the system completely and refill it with fresh potable water. Repeat this rinsing process until the water tastes and smells neutral.
Comparison of Cleaning Solutions
| Cleaning Agent | Effectiveness | Relative Cost | Required Duration |
|---|---|---|---|
| Liquid Bleach | High | Low | 4 to 12 Hours |
| White Vinegar | Moderate | Medium | 8 to 24 Hours |
| Hydrogen Peroxide | Moderate | High | 2 to 5 Hours |
Strategies for Algae Prevention
- Eliminate Light Exposure: Algae requires photosynthesis to thrive. If your tank is translucent, ensure it is stored in a dark compartment to block UV rays.
- Temperature Control: Store your vehicle in cool environments when possible. High temperatures accelerate the growth of organic organisms in stagnant water.
- Regular Water Cycling: If the vehicle is not in use, drain the fresh water tank completely. Leaving small amounts of water in the bottom creates a breeding ground for contaminants.
- In-line Filtration: Use an external filter when filling your tank to prevent microscopic spores and sediment from entering the system through the hose.
- Routine Maintenance: Sanitize the system at the start of every season, even if no visible growth is present, to maintain a sterile environment.