3 fxs is quite a bit of filtration, i dont see how they wouldnt do the job...
as for fish you could definitely fit those fish in your tank. Just remember though, everything can be peaceful one day and then you add 1 fish and the tank could be a warzone. So just keep an eye on them when/if you do add them. My current stock is Argentea,Regani,Maculicauda silver dollars and red hooks and small dovii and i plan on adding some festae very soon.but like i said all it takes is that 1 fish to not tolerate another and all hell could break lose.
as for fish you could definitely fit those fish in your tank. Just remember though, everything can be peaceful one day and then you add 1 fish and the tank could be a warzone. So just keep an eye on them when/if you do add them. My current stock is Argentea,Regani,Maculicauda silver dollars and red hooks and small dovii and i plan on adding some festae very soon.but like i said all it takes is that 1 fish to not tolerate another and all hell could break lose.