Water boatman / Backswimmer problem

Sep 17, 2016
6
North Tonawanda
Hi all. We had a problem with these bugs at the end of last year. We opened today and they’re still there.
We have a 20x40 25,000 gallon pool and they are mostly in the 9 foot deep end. They are FAST swimmers and skimming them is almost impossible.
Has anyone battled these guys before? How do we get rid of them!? They’re bites are like horseflies and I want to get rid of them before it’s warm enough for my 2 year old to get in.
HELP!
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