not to promote tangs in 70 g...
but i have a purple, hippo, kole, two percs and 2 neons in my 75 g reef..
they all do very well and swim together.... there is plenty of room for now and they are really active
BUT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! i'm constantly monitoring the water and weeekley water changes... this is def not recommended... i've had the hippo for over 2 yrs still about 3-4 inches, kole tang for about a yr i think, and the purple was added last novemeber....
The biggest problem fish i ever had was a small clown goby that would take down any sixed sailfin!!!!!! no joke,, i had a post on this and i had to get rid of the yellow lil monster!