In article ,
says...
On Wed, 1 Mar 2006 11:55:12 -0000, "H"
wrote:

Hi:
I've got 6 H Rasboras in a 7 gallon tank. I'd really like to get some
sort of bottom feeder that could clean up any food that sinks to the
bottom. I've tried ghost shrimp, but I had a couple die on me so I
don't
want to kill any more. Obviously it would have to be something small,
so
the load on the tank wouldn't be too great, and like to be solitary
since I could probably only put one in. Any ideas?
snip

Corys are shoaling fish, and a lone cory in a tank of strangers would
be a stressed cory. Corys are not garbage collectors, they have their
own dietary needs - they will eat some leftover food from the gravel,
but that does not mean they will like it, it will mean they are hungry
enough to eat anything. Your tank is small enough that it would only
take a few minutes a couple of times a week to siphon detritus from
your gravel using a small diameter siphon hose or even a piece of
rigid airline, connedted to an airline hose.

-- Mr Gardener

Yes, I'd read that Corys are happier in a group & I really can't have
much more in this size of tank. I think I'll just keep doing my gravel
vac and maybe add a snail and a small plant.
Thanks,
Freud