Hi,

I raise Gouldian Finches.  I have 4 pair and have been using a hexagonal aviary.  Presently I am in the process of acquiring some blue capped. I wish to increase my aviary size and use space more economically. 

I am unsure of which aviary is actually better the  Prevue Pet FO30 or the  Indoor Aviary 40"x30" x 6 Foot Tall for Small to Medium Birds AE-4030FL . I know the last is tallest but if I am thinking correctly it is always LxWxD. Perhaps you could assist me in this dilemma.

 I am when looking to acquire a coroner cage to use up one wall.  Any assistance or input you may be able to give, I am sure it would be helpful.  I also noted where one reviewer said the Prevue had a 1 inch gap. Is that true?
 

Sincerely,

Overall dimensions: 42" x 32" x 68" High.
Interior:  37-1/4" x 27-1/2" x 49" High
3/8" bar spacing

making it "roughly" 27 cubic feet of Interior space

The Indoor Aviary 40"x30" x 6 Foot Tall for Small to Medium Birds AE-4030FL has the following dimensions

Dimensions: 40" wide x 30" deep x 72" high
Bar Spacing 1/2

making it "roughly" 45 Cubic Feet

That said the AE has only a slightly larger foot print, but has about 80% more interior size than the Prevue F030.

The gap at the bottom of the Prevue F030 is not quite 3/4" and Finches in general don't spend a lot of time on the bottom of the cage so it's not really an issue. 

This is the corner cage we have with the smallest bar spacing 5/8" which would probably be too wide for Finches

Parrot Corner Cage 5/8" Bar Spacing w/ Play Top AE CC2727