玻璃加热棒
Glass heating rod
一般采用防暴玻璃外壳，具有价格低廉，使用范围广泛，可以应用在各种水族箱中的特点。不足是容易破碎。大型鱼缸里如果使用的话必须配有防护罩，免得被鱼儿破坏。
Generally, the anti explosion glass shell is used, which has the characteristics of low price and wide range of use, and can be used in various aquariums. The shortage is easy to break. Large fish tanks, if used, must be equipped with protective covers to prevent damage by fish.
不锈钢加热棒
Stainless steel heating rod
一般采用不锈钢外壳，具有坚固，耐用，有质感等优点。但是缺点就是某些具有腐蚀性的环境无法使用，比如说海水缸。
Generally, stainless steel shell is adopted, which has the advantages of firmness, durability and texture. But the disadvantage is that some corrosive environment can not be used, such as sea water tank.