What is the difference between ro65n and ro12n?

The only difference between the two items is the size of the containers. The RO65N is a 76 ounce container, the RO12N is a 22 ounce container. Thanks.

Do the instruction describe how (and how much) to dissolve in water before adding to the brine well. I'd rather not add as a powder.

Yes the intruction tell you how to and how much. I do not remember initial amount(1st time use), but I'm using 1/4 cup for 40 lbs bag of salt. Works great.

What is the difference between their "Rust Out" and "Iron Out" products? thanks in advance.

According to their MSDS.. They have the exact same list of active ingredients in the exact same ranges (see below) The overall percentage could vary somewhat, but I would imagine there is virtually no difference in these two products. Chemical name Common name and synonyms CAS number % Sodium hydrosulfite 15 - 40% Sodium carbonate 10 - 30% Sodium metabisulfite 10 - 30% Citric Acid 1 - 5% Sodium sulfite 1 - 5%

Over the years, have tested my hard water for iron 4-5 times and never found any. Any reason to use this stuff?

If you don't have iron ppm on the water from your source...no. People on well or city sources with high iron will see sinks and whatnot turn orange. That iron fouls the softener media (assuming they have one) overtime and this works good to "clean" it. Like the green bag of salt just in high concentration for the cleaner

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RO05B RO65N Rust Out Water Softener Cleaner And Iron Remover, 4.75 lb.

Product ID: 1316417

Details

Brand
Pro Products
Item Form
Powder
Material Feature
Organic
Scent
Unscented
Specific Uses For Product
Sink Toilet

💧Removes iron & rust buildup effectively

♻️Non-abrasive, organic formula

⚙️4.75 lb powder for easy dosing

11773 kr

Duties & taxes included

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Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Keep your water softener rust-free and running like new—because clean water is non-negotiable!

TRUSTED PROVEN - Highly rated with 4.7 stars from 2,251 users—join the savvy pros who never settle.
EFFORTLESS MAINTENANCE - Simply add ½ cup per 40 lbs of salt—layered dosing keeps your system rust-free.
MULTI SURFACE RUST REMOVER - Safe on porcelain, fiberglass, acrylic, and fabrics—beyond just your softener.
BOOST WATER QUALITY EFFICIENCY - Eliminates metallic and organic contaminants that degrade resin and water flow.
EXTEND YOUR SOFTENERS LIFESPAN - Restores resin beds by dissolving iron buildup for peak performance.

Pro Products RO05B Rust Out is a 4.75 lb organic, non-abrasive powder designed to remove iron and rust buildup from water softener resin beds. It enhances softener efficiency and lifespan by dissolving metallic and organic contaminants, while also safely removing rust stains from multiple household surfaces. Easy to use with salt dosing, it’s a trusted solution for maintaining high-iron well water systems.

Specifications

ASIN	B00608JV38
Best Sellers Rank	#58,088 in Health & Household ( See Top 100 in Health & Household ) #47 in Liquid Fabric Softener
Brand	Pro Products
Brand Name	Pro Products
Customer Reviews	4.7 out of 5 stars 2,269 Reviews
Global Trade Identification Number	00818125000283
Included Components	RO05B
Item Form	Powder
Item Volume	4.75 liters
Item Weight	4.8 pounds
Manufacturer	Pro Products, LLC
Material Feature	Organic
Material Features	Organic
Model Number	RO05B
Number of Items	1
Part Number	RO05B
Scent	Unscented
Size	76 Ounce (Pack of 1)
Special Features	Non Abrasive
Specific Uses For Product	Sink, Toilet
Surface Recommendation	Fabric, Metal, Ceramic, Glass, Stone, Fiberglass
UPC	818125000283
Unit Count	76 Ounce

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