Pond Boss Forums GENERAL QUESTIONS Water chemistry PAC

Has anyone had any experience using PolyAluminum Chloride instead of Aluminum Sulfate to clear water and reduce phosphorus? If so at what dosage rate? Thanks!

Erik, I haven't heard of anybody using it.

The "search button" is your friend....

ACH/PAC

Yes esp. if you know who to search for.

http://forums.pondboss.com/ubbthreads.ph...=true#Post37674

By M. Spinhirne
One additional note. There are other forms of aluminum salts that are used to clarify waters. Poly-aluminum chloride (PAC) and Aluminum chlorhydrate (ACH) are both liquid versions of aluminum salts. They work the same way as alum, but are easier to feed (liquid vs. solid). In the case of PAC, some long chain polymer impact of the aluminum is seen, and sometimes works better. The only down side is they cost approximately 2X alum.

One last thing. In my experience, no more than 10-30 ppm of alum or PAC is usually needed to clear up surface waters. I would start at 10 ppm and work up.


http://forums.pondboss.com/ubbthreads.ph...true#Post107992


http://forums.pondboss.com/ubbthreads.ph...=true#Post37729


http://forums.pondboss.com/ubbthreads.ph...=true#Post37705

Yes, PAC is often preferred over Alum due to its stronger charge neutralization and better performance across various temperatures. It works effectively for both clearing turbidity and reducing phosphorus.

For dosage, 10-20 mg/L (ppm) is usually a good starting point. You can adjust as the water begins to clear.

You can take a look at the comparative conclusions in this article.

Pac VS Alum