does he look like this but darker
then he is an armoured plecostomus,easy to find in google :)
cycled is when the water has matured,usually between six to eight
weeks,sooner if you can get some old stuff from a friends tank.
do you have or know anyone with a mature tank ?
(one that's been set up for 6 + months ?)
if you have rush over to their house if you can and beg for :)
some stuff from their filter.
toxins will build up very quickly in a 10gll with a catfish in it,
and because the filter does not have enough bacteria in it,there is nothing
to comsume the waste. perhaps add an air stone if you have one,don't over feed him,you don't want tonnes of uneaten food in there too.
ok enough waffel for the moment for you from me.