I dont have any tips regarding how to get them to surface quicker – except maybe to have more buckets 🙂
I have a few buckets – four regular and the small pools of water that can occur anywhere in the garden, so when I tjeck them I go from one to the other, and by the time I come back to no one bucket the larvaes have surfaced again. …
In that way I dont have to stay and wait untill they come up 🙂
Or I do other things in the meantime, just having a small container for the catched larvaes that I can continue to fill up and everytime I pass during the day I get the net ..
I am not sure how many days the ‘thing’ takes before it develops, thats something I yet need to find out, but now you might be able to learn that
God luck with the ‘hunting’