I have an 80 gallon high tank with 20 gallon sump. I currently have 4 Chromis and 2 Clownfish. I would like to complete my stock by adding a blue and yellow Tang. I can get a very good price at my lfs if I get them at the same time. So would I have a problem adding these two at the same time? And will my stock be ok for an 80 gallon tank? Thanks