depending on what you want to keep coral wise, I would add a easy grower coral to see how my system responds. If you have 2 clowns in there already I would wait at least a month from when you added them before placing new additions in the tank.
Thanks, I was in a position where I had to move the old 170 so I took the opportunity to add the small yellow tang, small powder blue tang and super small six line wrasse. All are doing well ( see pics )
I am wanting to add a clown tang or shoal tang to this system at some point but don't know if it's best to wait or if waiting will encourage tang aggression ?
Presume coral could be added fairly soon then, is there any other parameters I should be scheming regularly other than NH4, NO2, NO3, PO4. Then the foundation elements when coral is in ?