Brown & green & Other algae

[Nagra92]

Hello guys, i am new in Reef world , my tank is now 3 months Old , and i have this 3 different alagae in my tank
Now it is 80 gallaon tank
Now can any body guide me how to get rid of this alage ? Is there any Fish ? Or snails ? Or crab which can clear it or i have to do my self ? Or it will decay with time
This green & brown alage i dont want
I am ok with purple alagae !

also when i can introduce soft corals in my tank ? Please guide

 

[Nagra92]

Also i guide me any cleaning crew but make sure that will never hurt my Corals in future