those are african cichlids from lake malawt which would grow and eat your other fish
they also ideally should be kept at a higher Ph level than your current fish
i like your response with a touch of compensation
i was thinking more of devo
Crack that whip / Give the past a slip / Step on a crack / Break your momma's back / When a problem comes along / You must whip it
i run bare bottom for the aros in the big tank but substrate for the birchir tank, fine black and white river gravel matches the ornates colour
if aros try to take food off the bottom they end up with a mouthful
they are pretty good at seiving it out but i don't want to take a chance
good shot of you holding the tank cricketman
maybe swim bladder problem or intestinal
http://aquarium.ucsd.edu/Education/Lear ... f/body.swf
if swim bladder it can be emptied by inserting a hypodermic needle just below the lateral line and letting the gas out
haven't seen that before, so can;t offer any help sorry
i have emptied a male with dead, decomposing babies before but
the pouch was swollen not up into chest
maybe try the evac technique but tip him updide down to see if it is air higher op
as morcs has said disease in one disease in all of them
also same temp and water parameters in each tank
sump could be plastic bins stacked on top of each other, wet dry arrangement
large pond master pump then pipe out split into four
with ball valve on each line to regulate flow back to tanks
safest way would be to drill overflow in each tank