How long does it take for alum to clear a pond?

Expect to see results after 72 hours. If the pond doesn’t have much runoff and cycling water (i.e. several inlets or outlets), the results can last 10-12 years! If runoff is a problem, the treatment may only last 3-5 years, it just depends on your specific waterbody.

Can we use alum in fish pond?

Abstract. Alum was more effective than ferric sulfate, hydrated lime, or gypsum in removing clay turbidity from laboratory suspensions of clay. Alum applied to seven ponds at rates determined by this test removed 84 to 97% of the turbidity within 48 hours.

How much alum is an acre?

Alum (aluminum sulfate) Application rates are typically 100-450 pounds per surface acre.

How often should I apply aluminum sulfate to my pond?

Any way you apply it, it needs to be circulated through the pond or lake. At first, the water will turn a milky white, but within a few hours, the pond should already be clearer than before the treatment. It can be applied about every three days until you get the results wanted. Caleb asked a great question about Alum and algae.

What kind of sulfate to use on muddy pond?

Aluminum Sulfate for Muddy Ponds. Alum is the most effective for clearing clay turbidity (general term for describing the cloudiness or muddiness of water) from a pond. The application is usually a few hundred pounds per surface acre. When applying Aluminum Sulfate, it’s recommended that the pH is between 6.5 and 8.2.

How many pounds of aluminum sulfate per acre foot?

Aluminum Sulfate Granular Application rates for alum are recommended at 25 to 50 pounds per acre-foot of water per treatment. The number of applications needed will vary depending upon the concentration of suspended clay or algae particles. The first treatment should be made at the rate of 25 pounds per acre-foot.

How long does it take to remove alum from pond water?

A simple alum-requirement test was developed to determine the amount of alum needed to floc clay particles in pond water. Alum applied to seven ponds at rates determined by this test removed 84 to 97% of the turbidity within 48 hours.