Auto & Tools · Camco

Camco TST MAX RV Toilet Treatment

Toss one pod in the black tank and forget it — odor control and waste breakdown without measuring messy liquids.

Pre-measured drop-ins treat holding tanks up to 40 gallons.
Breaks down waste and tissue to help prevent clogs.
Septic-safe, biodegradable formula with a light orange scent.

$14.88

On Amazon when we checked (June 16, 2026) — live price may differ.

By Patrick Smith · Updated July 11, 2026 · How we review · We may earn a commission from Amazon links.

Price when checked: $14.88; on Amazon, June 16, 2026
Best for: Best for full-time and frequent RVers with standard holding tanks; a poor fit for…
Biggest complaint: The fixed 40-gallon dose is the recurring gripe — wasteful or fiddly for smaller tanks — and some find the…
Sources cited: 1; independent source

Reasons to buy

Owners praise dependable odor control between dumps and the zero-mess convenience of pre-measured pods that last months per tub.

Reasons to skip

The fixed 40-gallon dose is the recurring gripe — wasteful or fiddly for smaller tanks — and some find the scent very faint.

Tank treatment is the one RV consumable where skipping a dose has immediate social consequences, and Camco's TST MAX drop-ins are built around removing excuses: no measuring, no blue liquid to spill, one pod per dump-and-refill. Full-time RVers at Getaway Couple found each treatment holds odors down for up to a week, and a 30-pack lasted them over seven months of continuous travel — which puts the per-month cost near pocket change. The honest caveat is dosing: each pod is formulated for tanks up to 40 gallons, so owners of small or cassette tanks end up cutting packets open to split doses, which is awkward for a product whose whole pitch is convenience. The orange scent is present but mild — most owners count that as a feature.

What buyers say

Our summary of recurring themes in customer reviews on the Camco TST MAX RV Toilet Treatment Amazon listing (read July 2026) — not quotes or endorsements.

Most praised

Owners praise dependable odor control between dumps and the zero-mess convenience of pre-measured pods that last months per tub.

Most common complaint

The fixed 40-gallon dose is the recurring gripe — wasteful or fiddly for smaller tanks — and some find the scent very faint.

Worked best for

Best for full-time and frequent RVers with standard holding tanks; a poor fit for cassette toilets and compact rigs.

Frequently asked questions

How often do you add a drop-in?

One pod after each time you empty the black tank, along with enough water to cover the tank bottom. One treatment is rated for up to seven days of odor control.

Is it septic safe?

Yes — the formula is marketed as septic-safe and biodegradable, so tanks treated with it can be emptied into normal dump stations and septic-connected systems.

Do the pods dissolve on their own?

Yes. Drop the sealed pod into the toilet with water and the wrapper dissolves — no cutting or measuring needed for standard-size tanks.