Need some honest advice!

[memphissmc]

Hello all, im looking for a little help. With this being my first post let me tell you about my set up.. I have a 125 nitrites and ammonia at 0, nitrates usually stay around 10-20. Salinity is at 1.025. Temp is 75-77. Sump system and protein skimmer. 2 current ic pro 6ft lights and 2 wave makers. Tank has been set up for around 8 mths.

Currently have 2 clowns, dragon wrasse, red coris wrasse, labouts wrasse?, 2 blue spot gobies, 2 carpenter gobies, 2 chromis.

Various frogspawn, hammers, and torches.

My question is this, why can a tang seem to not survive? What am I missing? Everything I have mentioned thats in the tank and does very well, but if I try putting a tang or angel in there, they dont make it. Is it the tangs or me? Normally I would say me without question but with everything else surviving and thriving makes me wonder. Just had a leutenant tang die in QT after 2 days.

Any help would be greatly appreciated

 

[Brucealmighty]

Are you sure about your nitrites level? I would say that it is a high reading and could be the cause of problems

 

[Krw]

Tangs and angles are territorial and sensitive to change. How big is your tank? Mine like warmer temps. 81F also remember tangs need algae to eat, they graze continuously.