Hand Counter Fresh Flo these semi-square (rounded corner) polyethylene

these semi-square (rounded corner) polyethylene tanks will provide a greater volume of water per floor space than round tanks while still providing very good self cleaning capabilities

paddles or electricity in the water to damage the fish

It is rated at 80 gpm for clean water (for particulate laden water and/or to extend time between cleanings

Most parts are interchangeable for single and double diaphragm units

Hand Counter Fresh Flo these semi-square (rounded corner) polyethyleneEasily fits in your hand to be thumb operated. The register advances by one digit, up to 9,999, each time the button is pressed. A turn of the side knob resets the register back to zero. Its a great tool for counting algae cells, zooplankton, fry, people, etc.