lol,sorry for late reply.my tank has been set up for about 4months,fishless juz with live rocks and some hydra shaped corals.juz about 1 and half months i add fishies.i hav 4 of corals and around 2 live rocks(big).my water parameters are ok,juz my water salinity are a little bumpy,going up and down cause i used fan.the water evaporate way to fast about 5% aday of water.Anyway i bought two gobee,1 male 1 female,but i dont see them fighting.but dam it i dont know that they will fight,my lfs put them in a small container,dam it.bt how big will they grow??mine is about 3cm size.then the long nosed butterfly,i didnt buy it.but can anyone suggest few small active fish??my tank with just yellow tang swimming around is quite boring,lol,but i love them.by the way thanks to u both......