These were highly recommended to me by Nelson's Water Gardens where I got my pond. It's too late to try this now, but I certainly will next spring when I have a mosquito problem. According to my source these really work and don't harm pets. This is very important to me as I have two dogs.

Pros: Kills mosquitoes but not harmful to pets or humans

Cons: Can cause eye irritation

I was very hesitant to use anything unnatural in my pond. I have frogs living in it and the birds drink and bath in it. We did have alot of mosquitos around so I tried these and they did work.

Pros: safe

Cons: can cause eye irritation

We have just bought a house with a fountain/pond and this product was recommended for us to use since we have a dog and small children. We didn't get around to using this since we moved in too close to winter, but we are definitly going to try this next summer just based on the recommendation.

Pros: Keeps water safe for animals and kids

Cons: none known

We really didn't want to use anything unnatural in our pond but the wife said we had to for the mosquitos. These really work and people say they are safe. Supposidly they don't hurt other animals. We have frogs so I worried about them.

Pros: seem to work

Cons: please be safe

If you have any pond or open still water about your yard, this is a must. Just drop it in, and no more mosquitoes. Works great. But you will need a bunch of them if you have large still standing ponds.

Pros: Mandatory for pond owners

Cons: none