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Mini Secchi app and disk
The mini Secchi disk is a small, circular disk that is used to measure the transparency of water. The Secchi disk is named after its inventor, an Italian astronomer named …
MyPond - Az én kistavam
Ponds are small waterbodies (<10 ha) that can serve as refuge for a range of species including endangered and rare ones. They provide food and water for terrestrial animals (e.g. …