Blackwater contains human waste and is unsafe to dump anywhere except an approved sewer connection or dump station.  It must be stored in its own tank and disposed of very carefully.

Emptying your tank too often or when it’s still pretty “low” means solid waste may be left behind (search “poop pyramid“). The fuller the tank, the more the solid waste will break down, especially when using a biologic.

Pro Tip: Always use a biologic to assist with waste breakdown.  Wait until the holding tank is at least two-thirds (or more) full before emptying. If possible, don’t dump more than once every few days to a week—longer intervals mean more time to break down solids.

Camco TST Orange 30 Pack Ultra-Concentrated Citrus Scent RV Toilet Treatment Drop-Ins, Formaldehyde Free, Breaks Down Waste and Tissue, Septic Tank Safe, 30-Pack (41183)

$22.49
$16.54
 in stock
18 new from $16.44
1 used from $15.71
Free shipping
Amazon.com
as of July 13, 2021 2:08 pm

Features

  • Essential for RV black water holding tanks: Eliminates odors and helps break down waste and tissue in your RV's black water holding tank
  • Great smell: Fresh citrus scent. Ultra concentrated formula: The toughest odor stopper; Just one drop in treats up to a 40 gallon tank
  • Not made with bronopol: Does not contain the toxic, formaldehyde releasing ingredient bronopol
  • Safe for all septic tanks: Drop Ins are RV and marine approved and are 100% biodegradable
  • Quantity: 30 drop ins/container

Happy Campers Organic RV Holding Tank Treatment - 64 Treatments

$49.45  in stock
Amazon.com
as of July 13, 2021 2:08 pm

Features

  • ODOR FREE: Eliminates odors in the RV holding tank. Absolutely no chemical or sewer smell.
  • Biodegradable, environmentally friendly, septic tank friendly
  • EFFECTIVE: In extreme hot & cold temperatures ( over 100°)
  • EXTENDED DUMP INTERVAL: Keeps on working ( don't have to add more before dumping )
  • LIQUIFY: Waste solids & most ordinary household tissue ( no expensive special tissue needed )

Happy Campers Organic RV Holding Tank Treatment - 18 treatments

$24.45  in stock
Amazon.com
as of July 13, 2021 2:08 pm

Features

  • ODOR FREE: absolutely no sewer smell
  • EFFECTIVE: in extreme hot and cold temperatures (over 100° F)
  • LIQUIFY: waste solids and most ordinary household tissue (no expensive special tissue needed)

Valterra Pure Power Blue Waste Digester and Odor Eliminator - 128-Ounce Bottle

$30.35
$18.51
 in stock
18 new from $18.51
Amazon.com
as of July 13, 2021 2:08 pm

Features

  • SEPTIC SYSTEM CLEANER: Waste digestor and odor eliminator for your RV, camper, trailer, boat, and other septic systems
  • FUNCTIONAL: Liquifies all waste and toilet paper for easy draining
  • VERSATILE: Use in gray or black water tanks for added versatility
  • FRESH SCENT: Clean scent eliminates odor
  • ALL NATURAL: Approved for all emptying in any dump station. Safe for children and pets
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