Without wasting your time, here are … 50%. 4.5. Mounts vertically & easily sticks to the outside surface of any aquarium. Aquarium Digital Waterproof Thermometer LCD; Marina Stainless Steel Thermometer; DaToo Aquarium Thermometer; Inkbird Wireless Thermometer and Hygrometer; JJMG Fish Tank Thermometer; Fluval Wireless 2 in 1 Digital Thermometer ; Our Final Thoughts on Aquarium Thermometers; The Guide to Choosing Aquarium Thermometers. This Marina LCD digital thermometer provides accurate and easy-to-read temperature readings in Fahrenheit. Customer Reviews. Marina Marina LCD Digital Aquarium Thermometer $ 2.64 - $ 20.44 $ 44.99; Save $ 25 (55 %) FREE shipping over $49. With water temperature being such a critical factor for the well-being of fish, it?s important to have a good thermometer. 0%. 0%. The Marina LCD Digital Aquarium Thermometer is an easy-to-read liquid crystal display (LCD) aquarium thermometer that is reliably accurate to plus-or-minus 1¡ F: no guessing, no color confusion. This Marina LCD vertical mount liquid crystal thermometer provides accurate and easy to read temperatures readings in Fahrenheit and Centigrade. Ideal for all fresh and saltwater aquariums, the thermometer comes with an adhesive backing that makes mounting to the outside glass easy. Ideal for all fresh and saltwater aquariums, this vertical mount thermometer comes with an adhesive backing that makes mounting to the outside glass easy. 0%. Write a Review. More Choices Available. C. Chris, Gaithersburg MD on 2012/01/12 . Length: 7.6 cm (3 in) Other sizes available: 11220 Marina LCD Aquarium Thermometer, 22 to 30° C (72 to 86° F) Just place this removable thermometer in an easy to read position below waterline. Penn Plax Penn Plax Therma-Temp Full-Range Digital Thermometer $ 3.99 - $ 21.55 $ 47.99; Save $ 26 (55 %) FREE shipping over $49. Length: 4.45 cm (1.75 in) Length : 7.6 cm (3 in) Other sizes available: 11220 Marina LCD Aquarium Thermometer, Centigrade-Fahrenheit, 22 to 30° C (72 to 86° F) This Marina LCD vertical mount liquid crystal thermometer provides accurate and easy to read temperatures readings in Fahrenheit and Centigrade. Temperature ranges for this model: 18 to 30° C (64 to 86° F). Ideal for all fresh and saltwater aquariums, the thermometer comes with an adhesive backing that makes mounting to the outside glass easy. Ideal for all fresh and saltwater aquariums, the thermometer comes with an adhesive backing that makes mounting to the outside glass easy. 50%. Temperature ranges for this model: 19 to 30° C (66 to 88° F). Temperature ranges for this model : 19 to 31° C (66 to 88° F).