Hi Cindy. I have an Aro tank, but it's my least favorite of the ones I have. My top choice has been my Protank 2. It gets mixed
reviews, but I've had no issues with mine since I got it last August. I also like the Protank mini. My 3rd choice (close to 2nd choice really) is the baby brother to the Aro tank, the Aro 2.
All of these are Pyrex, the Aro tanks are covered in steel, pyrex on the inside. The bigger Aro tank, for me, hits too light and gets way too gurgly.
You'll get several suggestions on top of these, but these are my experience. Good luck!