Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants Killing watermeal

I just started to see a film starting to form on my pond.We have had a few 80+ degree days now.Last year the pond got covered.I ordered some whitecap off of Greg grimes link.
We have alot of rain in the forecast ,but as soon as it stops I am gonna try and kill it.How long does it take the herbicide to work?I don't want it diluted to much from rain and overflow.I ordered an 8 oz bottle.How many treatments will I get for a 1/4 acre pond,average depth of 6'.....Thank you very much for any advice....Joe

These herbicide labels confuse me. How much whitecap do I use for Watermeal?How many treatments will it take?.....Joe

bowjo, whitecap is supposed to be a one and done deal. You need to apply at the high rate for watermeal 90 ppb. Easy for me to do math at 8 ounces per acft. You got 1.5 acft so you really need 12 ounces of product. You can split the application half of total once rain stops and another half 2 weeks later. Apply evenely over the pond and dilute and pour in it degrades with UV.

If you need another 8 ounces we got it ready to go. GL.

Thank you Greg.That makes things alot easier to figure.I need to do a little measuring to figure my area a little closer.
Does the Whitecap have a shelf life or expiration date?
Thanks again ....Joe

Sorry do not know shelf life but your good for now that is for sure. GL.

bowjo...I was told by Sepro, the makers of Sonar, that an opened container has a shelf life of 8 years if stored properly. I would assume Whitecap would be similar but you could always contact the company to find out for sure. I have used a container that was opened 4 years prior and everything worked well. A FasTest confirmed the concentration.