Features February 2012 Issue

Solutions for a Stinky Holding Tank

Additives prove effective in reducing tank odors, but ventilation is the key to keeping the stink at bay.

Practical Sailor testers looked at a large field of holding tank additives and found that chemical treatments that rely on disinfection, surfactants, and deodorants are better than nothing, but they still left that distinctive public-restroom smell. We also compared eight top-performing additives from a new generation of tank treatments that use enzymes and bacteria cultures to reduce odors. Tests showed that these bio-augmenting treatments—including Odorlos, SeaLand Max Control, Camco’s TST Citrus, Thetford Eco-Smart, Nature-Zyme, and Aqua-Kem—reduced odors and reduced solids in the tanks, without the port-a-potty smell. We look at the pros and cons of these newer tank treatments, and examine the importance of tank ventilation in reducing odors.

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