FloMag PWT 6x16 Mag. Hydrox, .66 CF Bag, FloMag PWT 6x16

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.

About FloMag PWT 6x16 Magnesium Hydroxide Media

FloMag PWT is a granular magnesium hydroxide (Mag Hydrox) media used in water treatment tanks to gently raise the pH of acidic water. Delivered here as a convenient bagged quantity, it is designed to dissolve slowly as water passes through the bed, releasing minerals that neutralize acidity. The 6x16 designation refers to the mesh sizing of the granules, which balances contact time against flow through the media bed.

When You Need This Media

Low-pH or aggressive water is a common problem on private wells and some surface sources. Left untreated, acidic water can slowly attack copper piping, fixtures, and fittings, sometimes leaving blue-green staining on sinks and tubs or leading to pinhole leaks over time. If your water tests on the acidic side, a neutralizing media like FloMag is one of the standard ways to bring it back toward a more balanced range and protect your plumbing.

How It Fits and Servicing

FloMag is loaded into a mineral tank fitted with a control valve and riser tube, where it forms a bed the water flows through. Because the media is gradually consumed as it neutralizes acid, it needs periodic topping off rather than lasting indefinitely. Compared to calcite alone, magnesium hydroxide is often chosen when stronger or faster pH correction is wanted.

Not sure whether this is the right media or quantity for your tank and water chemistry? Water Softener Plus is glad to help you confirm fitment before you buy, and we include the documentation you need to load and service the bed with confidence.