First rule of thumb: Do not leave the black tank valve open when hooked to sewer let the black tank fill up to at least 3/4 full before dumping to prevent waste buildup.
Use RV-specific toilet paper and tank treatments to break down waste and control odors.
RV toilet paper and tank treatment can be purchased at most big box stores, all camper supply stores, as well as Amazon or other online retailers.
To use RV tank treatment chemicals effectively, follow these general steps:
After emptying your holding tanks, always add at least two to three gallons of water to create a water base and help suspend waste. For most treatments, pour the recommended dose into the toilet bowl, fill the bowl with water, and flush it down to ensure the treatment mixes with the water in the tank.
For specific products, the dosage varies. For example, Liquified RV Toilet Treatment recommends a standard dose of 1 ounce per 40 gallons of tank capacity, with the dose doubled in temperatures above 85°F. EcoStrong instructions also suggest a dose based on tank size, with a recommendation to double the dose in hot weather.
It is crucial to avoid using boiling water, bleach, antibacterial products, or harsh chemicals alongside these treatments, as they can interfere with the performance of enzyme or bacterial treatments. Some experts recommend using a probiotic treatment with live cultures, such as Just Science Probiotic RV Tank Treatment, mixed with Calgon Bath Beads to help break down waste and prevent it from sticking to tank walls.
For DIY methods like the “Geo Method,” mix a capful of liquid water softener like Calgon with a capful of dish soap like Dawn, flush the mixture down the toilet with several quarts of water, and ensure the tank is well-sloshed. This method is best performed right before driving and is considered effective for keeping tank walls slippery and minimizing buildup.
Always ensure the tank is thoroughly flushed after dumping, and consider using a flush wand or hose to clean the tank walls periodically. For long-term storage, completely empty and flush the tanks to prevent waste from hardening or causing mold.