Robink
2500 Club Member
I generally go by the rule one fish for every 10 gallons. With that said there are many who have way more or way less. All depends on your equipment and maintenance. Tangs poop a lot. Most tangs require a 180 gallon tank, except for the yellow, sailfin, kole and a few others. Since you already have 12 fish I would add 3 tangs, maybe all yellows (they look nice in a group) or one of each of the ones I mentioned.
If you go on live aquaria they list the minimum tank size for all the fish. You can also check their compatibility.
With tangs you need at least 3(or more) to minimize the aggression.
If you go on live aquaria they list the minimum tank size for all the fish. You can also check their compatibility.
With tangs you need at least 3(or more) to minimize the aggression.
Unless it's a 6 foot tank I would only go with zebrosoma (but not a sailfin) or bristle tooth tangs. Multiple tangs might be a bit dicey but might be doable. 4FordFamily will probably be the best source of a recommendation.
4FordFamily
Tang, Angel, and Wrasse Nerd!
I would say that it depends on your tanks ability to export nutrients (filter poo). As said, tangs are dirty fish. 3 tangs seems reasonable if smaller species. I would avoid any acanthurus tang in a 150 with that kind of stocking (including 3 more tangs). Bristletooth and smaller zebrasoma like yellow, purple, black, and scopas would be good choices. You may be able to mix three different zebrasoma species but add at the same time if you try that. Don't try 2 and a bristletooth that won't work well most likely!
Personally, I'd say only one zebrasoma sp. The likelihood that a pair or group of 3 would fall out and fight is high. In a tank that size the others simply wouldn't have the space to get out of the way. If you do go for 3, then contrary to the above is actually plump for convict tangs (Acanthurus triostegus). They stay relatively small, are generally peaceful amongst themselves and are less likely to harass other species too.
4FordFamily
Tang, Angel, and Wrasse Nerd!
Convict tangs are a good choice, assuming the tank owner utilizes proper qt and preventative measures. Good suggestion I had overlooked!
There are plenty of choices if you want a trio in a 150. I always suggest 1 from each genus especially if you are relatively new to tangs. Having only 1 of each Genus will greatly reduce the possibility of aggression as well as introducing them all together. QT procedures are a must but if none of your current fish have ever been thru some treatment you could have troubles when the new tangs are introduced.
My suggestion for Acanthurus is two of my favorites and very underrated fish. Often overlooked but truly stunning when healthy, the mimics. Acanthurus pyroferus the chocolate tang.
Acanthurus tristis mimics one of my favorite pygmy angels the Eibli. The above mentioned convict is also a very good candidate as well as the lavender Acanthurus nigrofuscus
As for Zebrasoma unless you feel like spending a lot of money you are basically stuck with 3 options. Purple, Scopas and Yellow (xanthurum, scopas, and flavescens). It would be best to avoid the sailfins as they get much to big for your tank.
There aren't any Ctenochaetus that wouldn't be happy in a 150 so you can take your pick there. You should know that the often desired Chevron takes on a very different coloration as an adult but they are still stunning. There are lots of choices in the genus and in my opinion some of the best are the ones we don't see very often. Some can be difficult to locate but are very inexpensive.
My suggestion for Acanthurus is two of my favorites and very underrated fish. Often overlooked but truly stunning when healthy, the mimics. Acanthurus pyroferus the chocolate tang.
Acanthurus tristis mimics one of my favorite pygmy angels the Eibli. The above mentioned convict is also a very good candidate as well as the lavender Acanthurus nigrofuscus
As for Zebrasoma unless you feel like spending a lot of money you are basically stuck with 3 options. Purple, Scopas and Yellow (xanthurum, scopas, and flavescens). It would be best to avoid the sailfins as they get much to big for your tank.
There aren't any Ctenochaetus that wouldn't be happy in a 150 so you can take your pick there. You should know that the often desired Chevron takes on a very different coloration as an adult but they are still stunning. There are lots of choices in the genus and in my opinion some of the best are the ones we don't see very often. Some can be difficult to locate but are very inexpensive.
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