Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants Phoslock

A quick look at the pricing on the name brand product mentioned showed to be $120 for 40 pounds...also claims to treat 1-2 acre feet. The name brand product is priced at $3/lb...Alum/Hydrated lime is the exact same effective result at ~1/3 that price per pound, applied.

Also, a treatment rate as described for the name brand is between 20 and 40 pounds per acre foot of water volume. Even for simply binding Phosphorus, and not also clearing colloidal clay, I have never seen, nor heard of, an application rate under 100 pounds per acre being effective. If only 40# per ac/ft were needed, I highly doubt you'd have a vegetation issue needing addressed to begin with.

In fact, to emphasize that you will likely need at least 3 times what the website claims per acre foot....The Koi pond shown on the company website says 1.5 pounds of phosclear is applied to 5500 gallons...that is a .0272% concentration. At a 20 to 40 pound per acre foot rate as described/recommended on the product website, 40 pounds equals a .0122% concentration and at 20 pounds per acre foot, only a .0061% concentration.

A .03% concentration is close to the bare minimum concentration needed to create the chemical reaction required for effectiveness.