Description
FloMag PWT 6x16 magnesium-oxide media raises the pH of acidic, low-pH water. This bag holds 0.66 cubic feet (roughly 50 lb) of granular magnesium hydroxide (MgO / "Mag. Hydrox") sized in the 6x16 mesh range for use as a neutralizing bed inside a backwashing mineral tank.
- Media type: magnesium-oxide pH-correction / acid-neutralizing media
- Grade: FloMag PWT, 6x16 mesh granular product
- Volume: 0.66 CF bag, approximately 50 lb net weight
- Function: neutralizes acidic water and drives up low pH
- Benefit: helps protect copper and metal plumbing from acid corrosion and blue-green staining
- Common blend partner: often layered with calcite for extra pH lift
- Periodic top-off: bed slowly dissolves and is replenished, not backwash-flushed away
Use FloMag PWT where a water test shows pH below the neutral range and you want to stop pipes and fixtures from etching or staining. Because magnesium oxide reacts more aggressively than calcite alone, a smaller charge can add significant alkalinity, which makes it useful for water that is only mildly acidic. This media does not soften water or remove iron; pair it with a softener or iron filter if those problems are present. Load it into a properly sized neutralizer tank, backwash to classify the bed, and top off periodically as the media is consumed by the incoming acidity.
Overview
- 🇺🇸 U.S.-based support and expert assistance
- 🔧 Built with trusted, industry-standard components
- 🚚 Ships nationwide - freight-safe packaging
- 🏠 Ideal for residential and light-commercial systems
Specs (Typical)
| Max Operating Pressure | 125 psi |
|---|---|
| Max Water Temp | 100 °F |
| Electrical | 120 V AC |
| Flow Range | 5-45 GPM (model dependent) |
Related: Control Valves . Parts . Get sizing help


