The utility model relates to a kind of photolytic
algae screen for
seawater aquarium, a square photolytic
algae screen, the inside of the first photolytic
algae screen is provided with the second photolytic algae screen, the inside of the first photolytic algae screen is provided with a plurality of first square holes, the inside of the second photolytic algae screen is provided with a plurality of second square holes, by setting first square hole, second square hole allows
longitudinal growth of algae, such as filamentous algae penetrates grid, increase two, three times effective growth area than flat surface, the utility model is slidably expanded by setting mechanism, including track, sliding sleeve, jack and inserting rod, so that the second photolytic algae screen can be telescopic along the track of the first photolytic algae screen Adjust, realize the flexible adjustment of algae screen coverage area, user can freely adjust the
effective action area of algae screen according to aquarium size, ensure that the
photosynthesis efficiency of algae is maximized, suitable for small to medium aquarium.