Summit 20-Pack Mosquito Dunk

great product appeared to work straight away.Update:- 3/06/20 just finished this card of dunks, only use on a large Koi pond to maintain, all the aquatic bugs ( mozzies, black, fruit flies etc.... ) Again only use in the spring/summer here in the UK, very temperature dependant, but they certainly break up the life cycles, I bought an expensive U/V, professional light tube zapper, before finding these! The zapper has not been used for years?The downside is that the product only appears to be available in USA? So the price with shipping, has more than doubled? Why? This makes them prohibitive now. Looks like the Zapper will make a comeback!!!

Mosquito dunks worked brilliantly. My small still (no flow or fountain) wildlife pond was full of mosquito lava which cleared in about 2 days. I use half a dunk once a month and so far it has remained clear of them.

Great product, I have used these to stop the mozies from breading in the water butts. Not at the moment as all 7 of them are dry as a bone!!!!

Brilliant stuff, my filters used to get clogged up with lava. Not any more.I have to big ponds so two in bottom pond and one top does the trick

Would definitely recommend this product if you have a problem with mosquitoes in your pond a 1st class product, Works like a charm...

Just 1/4 dunk in each water butt solved the Mosquito problem completely for us.

Good nasty Chen's for destroying mosquitoes but the price is too much..So I changed all my fish to mosquito and fly assassin's now I don't need to buy these anymore as my pond acts as a mega Trap ..

Works well. Need bigger pack