Reddit reviews Fluval 10505 Chi II Aquarium Set, 5 gal,White

Fluval CHI 5G Tank - Dimensions are pretty good IMO, construction is awesome as well.

You can get the bundle with filter and light, but I prefer my sponge filters with 10 watt 65k LEDs.

I have a Fluval Chi aquarium that happens to make a perfect drinking fountain for my cat. He's always drinking out of it.

It's this tank

http://www.amazon.com/gp/aw/d/B00FSQCXF6/ref=mp_s_a_1_1?qid=1427328543&sr=8-1&keywords=Chi+fish+tank&dpPl=1&dpID=511VDbzRsEL&ref=plSrch&pi=AC_SY200_QL40

I don't know what dimensions exactly you are looking for, how much you want to spend, or how good these tanks are, but here are some 5 gallon tanks that are taller as opposed to wider.

http://www.amazon.com/Marineland-ML90609-Portrait-Aquarium-5-Gallon/dp/B00O8SZTKQ/ref=sr_1_2?s=pet-supplies&ie=UTF8&qid=1458881910&sr=1-2&keywords=5+gallon+fish+tank

http://www.amazon.com/Marineland-Pillar-Aquarium-Kit-6-Gallon/dp/B007SUUH7Q/ref=sr_1_13?s=pet-supplies&ie=UTF8&qid=1458881910&sr=1-13&keywords=5+gallon+fish+tank

http://www.amazon.com/Fluval-Chi-Aquarium-Set-5-Gallon/dp/B00FSQCXF6/ref=sr_1_14?s=pet-supplies&ie=UTF8&qid=1458881910&sr=1-14&keywords=5+gallon+fish+tank

http://www.amazon.com/Marineland-Contour-Glass-Aquarium-5-Gallon/dp/B00GOFS8P4/ref=sr_1_20?s=pet-supplies&ie=UTF8&qid=1458881910&sr=1-20&keywords=5+gallon+fish+tank

Fluval Chi also on sale.

I haven't used the Chi, but if you're using the spec V for bettas, you'll have to baffle the water output. Cut a small corner of the filter sponge, and shove it in the output tube to reduce the flow. Clean periodically when the flow get too backed up.

If you're interested in a kit and not just a bare tank and don't mind shipping, I'm looking to offload a new Fluval Chi (second model) and get rid of a used 5 gallon Petsmart tank (their knock-off of the Fluval Spec V)

Otherwise if you don't mind getting something bigger, a 20G long and 40G breeders are nice starter tanks with the dollar per gallon sale coming up.