Thiablue.....the wasp were unreal! They are the ones we call "yellow jackets" & they are mean!
The day we finally gave up on the pool was when we left the cover off for 4 hours & came back & scooped off almost a feed bucket worth of wasp!!!! I've noticed one GREAT thing though.....the boys water trough NEVER has wasp....but the chickens share their yard so I think they are helping with that....Can't wait to finish fencing the property so the chickens can have run of the entire place!
Audra.....we have plague like wasp swarms & I have never seen the babies....only the big ones!
Jcran- The goats water gets wasp too.....but a goat water trough is a nessesity......the pool wasn't
I scoop wasp off twice every day...Two weeks ago we noticed the goats hadn't drank because of the wasp & Sabrina had wasp stings all over her neck

They were having the same level of wasp as we worked up to with the pool.....Added two smaller water buckets in the pen away from the big one so they could drink.......Then we bought several cans of wasp killer & hubby, myself & my brother's went hunting wasp nest......got 16 on the back area of my property & sprayed them in the evening when most of the wasp were on them....Next day still a good deal of wasp! Then we put on heavy jeans & boots and walked through the cactus & mesquites that are heavy behind the pen.... Oh my goodness the cactus plants had several nest in the centers close to the bottom. Ended up getting 19 large nest back there!
This past week the wasp have been minimal..... I scoop off 10 or so from the trough twice a day now instead of inches thick worth, and this is the first time in 2 years I've seen just regular bees

The bees don't act bothersome......nor do I see them piled up dead in the water....just a few here & there on the edge of the water on occasion....They haven't stung me either......unlike the wasp who seem much more aggressive & who I'm carrying several stings from after my wasp killing spree.....
It was labor intensive & time consuming to find all those nest....and it's not a permanent fix....we will have to do it again, but this past week has been nice to go out to the goat pen & actually see the surface of the water, not just gobs of wasp..... Next I'm going to ask my neighbor if I can go do the back of his property....he has old farm equipment, tires & other unused things sitting back there opposite the goat pen & I'm certain there are lots of nest there too & that's where wasp are coming from now.
I have a box with 12 cans of wasp & hornet spray......going to comb through the front of my property this evening, & hopefully the neighbor's property this weekend.
Depending on how often I have to go on a property wide killing spree to keep wasp numbers bearable, I may just buy stocks in wasp killer!