The best time of year to sample depends entirely on your target species and the sampling site. 

For example, sampling during the target species' breeding season may be your best bet, as the organism is more active and sperm and eggs may be present in the water. 

In the case of other species, such as certain species of algae, their numbers peak during the hottest months of summer. 

Choosing a time to sample is not always easy. Please contact us to discuss your sampling site and study species more thoroughly and we can give you a customized recommendation.