- Fits the Aquasana Rhino EQ-300, EQ-301, EQ-300-85 or EQ-301-85 whole house water filters
- KDF-85 gives best performance in well water with iron (<2 PPM), sulfur or hydrogen sulfide (rotten egg smell)
- Simple to upgrade your EQ-300 or EQ-301 for better well water
- Filters over 100 dangerous contaminants: chlorine, arsenic, lead, cadmium, VOCs and more
- Leaves the healthy, good tasting minerals in your water
- High capacity, 300,000 gallon, 3 year main filter replacement
Aquasana EQ-300-85R Main Replacement Unit
The Aquasana EQ-300-85R main filter unit includes three stages of filtration:
- KDF-85 filtration media to filter iron, sulfur and hydrogen sulfide (rotten egg smell) and transform chlorine to harmless zinc chloride
- Large granule bituminous activated carbon to remove synthetic chemicals
- Small granule coconut shell based activated carbon to remove organic impurities
Other Features
- 300,000 gallons or 3 year service life so you won't have to replace it very often
- Leaves healthy minerals like calcium and magnesium in the water for great tasting water that's also good for you
Required Pre-Filtration
An Aquasana whole house pre-filter cartridge is required as a first step of filtration to remove sediment.
This pre-filter greatly extends the service life of the EQ-300-85R main filter unit.
Be sure to replace your pre-filter every 1 to 3 months, depending on input water quality.
Which Whole House Filters does the EQ-300-85R Fit?
An Aquasana EQ-300-85R fits the Aquasana EQ-300 Rhino, the Aquasana EQ-301, the Aquasana EQ-300-85 and the Aquasana EQ-301-85.
If you have an EQ-300 or EQ-301, the EQ-300-85R is an exact fit, so you can upgrade to the EQ-300-85R for better performance filtration of iron, sulfur and hydrogen sulfide.
Click on the pictures below for more information about these whole house filters.



