I have posted a couple of times about using nerite snails in cichlid tanks (search the site for those posts). If you aren’t familiar with them, let me add something that I didn’t mention previously. Though you may upright some snails that you find upside down, don’t expect them to always start moving immediately. In fact, sometimes you’ll see an upside down snail and the aperture will look empty. Neither means the snail is dead.
For those of you looking to add a glass/decoration cleaner to your tank, consider the nerite snail. I’ve posted before about using nerite snails to clean up diatomaceous algae aka brown algae. They are great cleaners, inexpensive, available, and require little maintenance.
Is your tank overrun with diatomaceous algae, more commonly called brown algae? Or does your tank simply contain more of it than you would like? There are numerous factors that can contribute to an overabundance of this brown film. Mostly associated with newly set-up tanks, even established tanks are not immune. I know, because some of my tanks have brown algae even though the they’ve been established and running for years.