IMO, i would not put a school of tangs in a tank that is 130 gallons, i would only put one in a tnk, if it were at least 75 gallons and maybe 100(depending ont he tang) in a 150 or around that, i would maybe go with 2, but NOT A SCHOOL
but now, a salesman on the other hand, may just go ahead and advise you to do so
now, i am gonna add to the fact of size, tangs are generally a larger fish, and if you figure their adult size(varies by species) 3 or 4 of them could be pretty close to your full stocking limits
let me rephrase on the angels, they are not extremely hard to keep, but DO require a mature and stable tank, i would not add one to a tank less than 5 or 6 months old because of this(which ahs been stable for 5 or 6 months), their are somewhat hearty, but not a beginner fish for a new immature aquarium, and MOST any fish seems to do fine in afish store, and this is partly b/c they do not stay there long, as responsible hobbyists, we adopt these fish and intend to have them for years, not days or weeks, and many lfs's have the notion that any fish that lives several weeks is fine, NOT TRUE, we in sw aquaria like to see years
HTH to clear some of the fog
PS, could you please do us a favor and restructure your sig to more of a horizontal nature, it is kinda long to scroll through(i am courtiously asking aas a fellow member)
<img src="graemlins//angel.gif" border="0" alt="[angel]" />