a few questions abouit fire mouth cichlids
 

How many can I (if any) have in a 44 gallon tank? Are they ok with gravel?
also I just bought a new filter good for 45-70 gallon tanks, will this cause to much current for them? And finally, will a bubbler ornament cause them stress?

mine don't fuss over bubbles if and when i have them,as for the gravel,
i find they love to dig pits for the fry,so don't expect perfect gravel lol,
mine like to choose between lots of cover and being out in the open,especially with the fry,
they're are in a planted tank with rocks,wood and caves

Have a read of our profile, click on Firemouth. It references substrate, and in a 40g a pair is fine. The bubbler is fine as Willow mentioned, but they do not like a strong current, as mentioned in the profile.

what would be some good plants I can put in with theses guys?

i've got java in with mine,also giant vallis,
i've found mine like to dig under the drift wood,so i had to keep this in mind when
placing it in the tank,also rocks need to be sunk down into the substrate otherwise
under mining can be dangerous,they will love you for plenty of caves.

if i had a tank spare i would house them on their own,as the fry are getting eaten,
and i would like some to reach maturity.