QUOTE(ilovefish @ Aug 22 2006, 02:01 PM) [snapback]565005[/snapback]
he is a rubbernose not a bristlenose. and it is a whisper in tank filter that does 150g an hour i am also thinking about getting a smaller one too so i have extra filtration.
right now the plants are growing(i got thise bulbs at w.m.) so they are just starting to grow but i was thinking of getting a few other plants this week(like anarcis(sp?) or java fern or something) i made a little cave for himout of a flower pot and sometimes i think he goes in this little coral looking bubble thing but he is just usually behind the filter. and i put food near him under the filter at night after my gf have had a big meal and they still gobble it up like crazy.grrr

Okay,Rubbernose/Bristlenose-whatever.They're both Pleco's that get around the same size,and males still get territorial. As I said,it can be done and has been,but most times if you end up with two males-you chance problems.With that said,it is on you.
For a 29 gal,it's recommended when housing Goldie's to go at least 10x's filtration for the size of tank you have,so you'd need at least 290gph,and actually would be better off even going higher than that,because of the waste that Goldies and Pleco's are known for producing.
You'll have to make sure that the things for him to hide in are big enough so he's able to get in and out without getting stuck.You'll also have to make sure that somehow you figure a way for him to eat so he doesn't starve.Do you feed your goldfish pellet's?If so ,it sometimes takes a minute or two for them to chew-have you tried feeding the Pleco something at the same time while they're busy chewing?