amazon!
WGV Large Bowl Glass Vase, Diameter 16", Height 14", (Multiple Sizes Choices) Clear Huge Round Bubble Vase Jar, Floral Planter Terrarium for Wedding Event Home Decor, 1 Piece (VBW1614) https://www.amazon.com/dp/B07Z18SS1F/ref=cm_sw_r_cp_api_glt_i_V8VB56QENX8SP1YJ190P?_encoding=UTF8&psc=1
off of amazon! did the math on it and it’s 7.2 gallons empty
WGV Large Bowl Glass Vase, Diameter 16", Height 14", (Multiple Sizes Choices) Clear Huge Round Bubble Vase Jar, Floral Planter Terrarium for Wedding E https://www.amazon.com/dp/B07Z18SS1F/ref=cm_sw_r_cp_apip_afnzcBe57XiJI
Amazon! Link it below!
https://www.amazon.com/Diameter-Container-Planter-Terrarium-Wedding/dp/B07Z18SS1F
Also, go search for foo the flowerhorn on youtube and on his video about his no filter betta bowl set up, on the description he have links on different bowls of different sizes as well!
Hello OP. This tank is beautiful, and I agree fish can live in bowls provided they are the right gallonage. I found this study on fish behavior and well being when placed in a bowl vs. a standard rectangular aquarium:
https://silo.tips/download/report-biorb-aquarium-project# (Link takes you to the download page for the PDF, but scrolling down on the page also gives an abstract of the information within it)
The study found that there is no noticeable difference in behavior of fish living in bowls vs. standard aquariums. They also tested for ocular distortion and found that rectangular aquariums produce reflections that can be more unappealing to the human eye. They could not completely test the ocular distortion of fish, but because the fish acted the same in both forms of aquarium it is believed that the distortion has little to no effect on the fish’s wellbeing (fish likely don’t understand the world outside of their tanks anyways). All of this is to say I agree with your stance on bowls, however, I do not agree with the gallon size of your tank. I found this bowl on amazon. It is supposedly over 8 gallons however with how thick the glass is it would really only be 6 1/2. With substrate and decorations it should put you with a solid 5 gallons of swim room for your betta, which is better than what most people on this subreddit recommend. I agree with your stance, however, if you’re going to take a stand on something you should do it properly and leave no room for error.
https://www.amazon.com/dp/B07Z18SS1F/ref=cm_sw_r_cp_api_i_2CCMPERKVAQQSJTGX0K8?psc=1
Thank you, it is an 8 gallon bowl. I got it at a local home goods store. However I think this is the same one.
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https://www.amazon.com/gp/product/B07Z18SS1F/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
This may help: https://www.amazon.com/WGV-Clear-Round-Bubble-10-Inch/dp/B07Z18SS1F?th=1&psc=1
Mine is a little bigger then this but I got mine from a local aquarium shop. This is the closest I can find to my size on Amazon.