cool, thanks everyone, i always get paranoid that i have too many fish in my tanks, just checking opinions, and yes there black skirt tetras, i got them becusae there very deep bodied and wont get eaten by the bushfish. and yes i do have it massivly filtered, canisters filled with biomedia at a turn over of about 11 times per hour. i was asking cause i just had to heat treat for ich, got some sick loaches. anyway i lost a pair of Betta Pugnax in the treatment but everything is fine and normal now, i think ill get some more tetras in the shcool, thanks