I place these in about per month back and they are ideal. Bugs at our doorway are lessened about 95% so we don’t really have to dread opening the door during the night time and getting swarmed.” Goldfish, koi, minnows, and guppies will all consume mosquito larvae in pools. https://tbookmark.com/story17414205/what-does-what-type-of-mosquito-carries-malaria-mean