"dave" wrote in message
om...
Hi,
Ive got an oscar w/ a problem. He can't poop!

Highly unlikely.....

In the case that this is a genuine post then the best kown purgative is
Epsom salts. Can't remember the dose but Google should find it for you. Its
worked every time I've used it inside an hour or two. Put the fish in a
small bare tank or a bucket (and remember to cover it!) - you'll soon see
the evidence!

I.