When I upgrade

Can I house 4 more fish

 

A little more data please? Upgrade from what to what?

M

 

55 to 90

 

first it depends on what your wanting to add. its all dependant on that. with your current fish, i think it wil lbe tough to squeeze 4 more in. especially with how big hippos can get.

 

I agree here, you already have 3 fish that are on the larger side, the two tangs and angel. However it also depends on your filtration mainly skimmer and how big your sump is, refugium etc. I would caution against it as of now, but we really can't help until you know exactly what the setup will be and what fish you want to add.

 

copper band, maby imperior, naso or purple

 

Fun choices, But even adding those in addition to what you have you're gonna need a 120/125g min... and a heck of a good/oversized skimmer. Trust me with 5 tangs in my 120g, Im glad I overpowered the skimmer by 100g! That thing pulls out gunk like mad.