frogs, algae eaters, snails....

ok, to put this simply, i like frogs (water frogs of course) and was
curious if they work well in an aquarium. i've heard they just hide
all day... any comments...?

i recently set up a 32 gal tank and am sort of worried that it might
grow algae. my 10 gal tank didn't but it was on the other side of the
room. i keep my shades shut so little sunlight gets in the room...
but would an algae eater help from having to do gravel vacs as often
also, or no? also, do snails pretty much do the same job as algae
eaters (corys, plecs, ect.)? there is a certain type of pleco i saw
in my book (forgot the name of the fish) but it is black and white and
i was thinking about getting 1 like that, or are they more comfortable
schooling in groups of 3 or more?

thanks in advance,
Danya