"Christopher" wrote in
hlink.net:

will the ottos eat the really rough green algae that I get on my plant
leaves and glass?
also whats the max size of the ottos and is there mroe than one type
(like with plecos)


Probably not right away. They really prefer new growth algae. So, clean
the old stuff off the glass as best you can when you put the ottos in and
they will probably keep the glass clean.