Designed specifically for aquarium use to measure the salinity of natural sea water (NSW). Most handheld saltwater refractometers available in the hobby are designed and calibrated for testing brine solution, i.e. sodium chlorid...
Removable feeding tube, where you can place food inside.
Strong suction cups to hold the trap in place. First remove the thin plastic cover on the suction cups, loosen the suction cup`s screw, press the suction cups...