Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants weeds going nuts....

To treat the pond, you have to calculate the gallons of water in it.

So, you have to know 2 things minimum, 3 things is best.

1) Surface area
2) Maximum depth
3) Many depth readings to more accurately calculate the average depth, and then the corresponding volume of water.

If you know 1 and 2, take 1 and half of 2 to get average volume of water.

1 acre foot of water (one surface acre, one foot deep) is 325,851 gallons.

i.e. 1/2 surface acre, max depth 10' = 1/4 2.5 ac/ft of water.

Fluridone can be sprayed into the pond with a coarse stream, instead of a fine mist, but it's not the recommended way to do it.

Weeds don't need to be raked out, but if using a contact herbicide, only treat 1/2 the pond at a time to prevent an O2 crash when they die and start to decompose. Fluridone kills slower, so the "die all at once" scenario and resulting O2 crash usually doesn't happen.

EWM is susceptible to Fluridone at levels of 7-10 PPB. i.e. roughly 1 fl. oz of Sonar A.S. per ac/ft of water.