Quick Answer: Yes, with caution. Just remember that it is safe to use Rid-X in your holding tanks only if you use the correct product and amount.
A/C Pro Vent & Duct Cleaner Odor Neutralizer (10 oz.) 17900 - Advance Auto Parts
PRIME GUARD minus 50°F RV and Marine Antifreeze is a premium winterizing formulation safe for use in all types of potable water and plumbing systems.
128 fl. oz. Ethyl Alcohol -50°F Universal Non- Potable RV Antifreeze
Got these for a steal, but no idea what they held… safe for rain barrels? : r/homestead
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POWERFUL, SAFE RV SEPTIC SYSTEM TREATMENT - Formaldehyde Free, 20 Septic Tank Enzyme Deodorizing Packets per bag in a Mulberry Scent to dissolve
Firebelly Outfitters RV Holding Tank Deodorizer + Septic Tank Treatment + Cleaner - 20 Packets, Mulberry – Sewer Solution, Marine Camper Portable
Rid-X Holding Tank Deodorizer : Health & Household
Breast Cancer Camper, Motorhome + RV Donation Program
FLEXIBLE RV ROOF COATING - Solar reflective, cool roof & UV resistant, Final membrane has over 1000% elongation preventing adhesion failure, and is UV
Liquid Rubber RV Roof Coating - Solar Reflective Sealant, Trailer and Camper Roof Repair, Waterproof, Easy to Apply, Brilliant White,1 Gallon
How To Make Any Cabover Camper Fit A Toyota Tacoma Or Any 1/4 Ton Truck ~ AOWANDERS
Meguiars Whole Car Air Re-Fresher Odor Eliminator, New Car Scent, 2 oz., Aerosol G16402 - Advance Auto Parts
Can I Use My Home DirecTV Receiver in My RV? - Happy Camper Club
Rid-X Holding Tank Deodorizer : Health & Household
Rid-x Holding Tank Deodorizer Pacs, for Rv, Boats, & Portable Toilets, Fresh Scent, 8 Count : Automotive
POWERFUL, SAFE RV SEPTIC SYSTEM TREATMENT - Formaldehyde Free, 20 Septic Tank Enzyme Deodorizing Packets per bag in a Mulberry Scent to dissolve
Firebelly Outfitters RV Holding Tank Deodorizer + Septic Tank Treatment + Cleaner - 20 Packets, Mulberry – Sewer Solution, Marine Camper Portable
24 RV Kitchen Gadgets Every Camper Needs