5 horned nerite fresh water aquarium snails by sevenseasupply sevenseasupply 100% guarantee alive on arrival only. we cannot guarantee after that due to un controllable of your aquarium condition are very. please read care instruction. horned nerite snails are a tropical freshwater species of aquarium snail. they are easily identified by the multiple dark horns that protrude from their shell. the shell is yellow in color with thick black swirls along the edge. they are popular algae eaters and debris removers. most notably they will keep your glass crystal clear. they are available to purchase at most lfs or from other hobbyists. horned nerite snails are popular and pricier than other snails because they are impossible to breed in freshwater. nerite snails can grow up to 1" but adults are more commonly found between 1/2 and 3/4" in size. horned nerite snails can also be used in outdoor ponds for similar purpose. the optimum aquarium temperature for horned nerite snails is around 70°f - 80°f horned nerite snails require ph between about 6.5 and 8. relative water hardness for horned nerite snails should be in the range of 6-12dh. horned nerite snails are hardy species and are able to withstand captivity fluctuations.