Plankton counting chamber for the identification and enumeration of planktonic algae and small planktonic animals in water samples under the optical microscope Counting pool surface area 20*50mm divided into 1000 small squares with clear lines and reusable. Slide size 25*75mm; Counting area 20*50mm; Clear lines, reusable. Suitable for small plankton; planktonic animals; rotifers; small plankton diatoms (50um-1mm) Convenient operation: The design is ergonomic, easy to clean and store, and improves experimental efficiency.