MSMA (monosodium methanearsonate) is an arsenic-based grass killer. It kills grassy weeds such as crabgrass and goosegrass without harming most turfgrasses. It contains organic arsenic that, according to the University of Tennessee Extension, is less harmful than aspirin.
While open-fit hearing aids are the most popular choice of hearing aids and certainly offer many benefits, they are not for everyone. The best practice before selecting a hearing aid is to have a hearing test done by a qualified hearing healthcare provider. The best style of hearing aid for an individual depends on hearing test results, dexterity, vision, communication needs, lifestyle and what they can afford.
Open Fit Hearing Aids. Open fit hearing aids do not completely fill your ear canal. Instead, an open fit device is usually a very small behind-the-ear hearing aid with a small tube or wire that connects to a speaker in the ear canal.ustom Fit Hearing Aids. Custom fit hearing aids are just that custom molded to fit inside your ear canal. They can be completely inside the ear canal, fit partly inside, fill the lower portion of the outer ear, or fill most of the bowl-shaped area of the outer ear.