Do I have too much livestock?

75g established for 2 years
moved to my house and cleaned 3 weeks ago
new substrate: 30lb argonite, 30lb coral sand
about 70+ lbs. LR
Aquac EV-120 Protein Skimmer
MH ballasts (2x175w) retrofit setup but not using
2x65w Actinic 03 PCs running 12 hours a day
Sump w/bioballs
Wavemaker
AquaC 30 Powerhead connected to overflow box

Livestock:
about 8-10 small hermit crabs
about 3-5 snails
Large Hermit Crab
Peppermint Shrimp
Combtooth Blenny (4.5 in.)
Yellow Tang (5 in. piggy)
2 blue damsels (3 in. each)
2 small yellowtail damsels
2 tomato clowns
small 3 in. body black longspine urchin

Wondering if I can get a naso tang with this group...or a hairy mushroom? The urchin or hermit might eat it...?

 

Your livestock looks fine to me. You should be able to get a naso just watch out the tangs may not get along to great. I would get rid of the urchin I believe they eat all corals and coraline alae.

 

Oh but I would wait at least a month to get any more fish since you just moved the setup.

 

You should do fine with adding a Naso Tang temporarilly as the Naso Tang will get rather large in time. For the most part, as long as the Tangs being added are not same body style or species, aggressive behavior should not be evident, though their are exceptions. I have a Yellow, Orange Tipped Bristlemouth and a Naso Tang and they get along fine.
Often times, it makes a difference as to how you add the Tangs and when that can present a problem or lack thereof!
As for the Black Diadema(Long Spine Urchin, they consume algae and coralline as well, but if you have coralline, it should continue to grow at a faster rate than it is consumed by the Urchin. The benefits provided by the Urchin far outweigh the coralline eaten by them in my opinion! They do not eat coral and fish...Keep the Urchin!

 

I have 4 of the black urchins and thought about taking them out. They have grown big too. They do eat up my coraline on the glass but not the rocks. I think they do more good than harm. At least I don't have to scrape coraline off the back glass

 

my recomendation (sp) is if you can find your naso get it as small as you can.. this way he an grow to the tank in a few years, Then in one year and out grow it... I guess i should say with big breed of fish alway buy then when small... Hope that helps..



Good Luck.....!!!

 

We added a Naso with no problem.....but it will out grow a 75g....they can get to about 18".

 

You may run into aggression from the yellow since it's established as well as the Naso outgrowing the tank. Personally I wouldn't add it, there are better community and long-term options.

 

I would agree.

 

I second that... or third... lol.
You want one cuz they are pretty but they get up to 18" and the minimum tank for those is like in the 6 foot region. They need room to grow and run when scared. My Powder Blue kicked my Naso's butt and my PB was more then half the size smaller then the Naso. In a 75 the Naso would be so unhappy.
Your inch of fish is like 21-ish, which is 3 gallons of water per inch of fish... you are right were you need to be... let it stabilize a bit longer since you just moved it. I know the Naso is PRETTY but the are abundant enough to get one later with the right circumstances.