I am going to be getting a Nano tank or building one myself soon that will be able to fit within my Ikea Expedit or Bonde bookshelf.* Hoping to do a small aquascape in there and intend to have a single betta and maybe a shrimp or two. I already have a betta that I bought but her shipment has been delayed slightly so is not being sent for another week which gives me time to get organised plus I've just been paid at work. Which aquarium would you prefer if you were buying this? 1) biOrb Tube 15 £110 + heater 2) Fluval Chi 19L £65 + heater 3) Ciano Nexus Pure 15 £50 + heater 4) Own build 15x13x13 5 or 6mm Acrylic cube £50app + heater filter etc I believe the first three don't have a heater so I would need to buy one. I'm a big fan of under tank heat mats but it might not be possible on the Ciano or biOrb. If I make my own aquarium it would be able to use more of the area of the bookshelf more effectively. The size is roughly 13"x15"x13". I believe I could use most of this space with a few inch or so gap at the top for a light and sliding cover. Then maybe an inch or two to the water level. This would give me up to around 6½imp gal 8 US or roughly 30 Litres to work with. I can always reduce the water level to lower and maybe also put a divider in there for another male betta. I would need to also buy a heater and filter for my own build. Perhaps a small Eheim or Fluval internal sponge filter. I do love the biOrb but it is so expensive. Unfortunately, the Flex 34 doesn't fit it is slightly too big but that is another tank I love and may get at a later time for an aquascape with a half dozen Jae Barbs or CPD's if I find the room to put it somewhere else. What are your thoughts and which option would you take? Do you have any experience with any of the above including your own build? Please let me know. John * I have already checked the weight and it would be able to take the weight. My Bonde bookcases store a lot of old vinyl records and books which are extremely heavy. My Expedit also has a Plasma and other stuff on top. I remember doing all the calculations for my Vinyl when I originally got the Bonde bookcases and I know roughly how much weight they can take. I also have a 25imp gal 29 us gal 110 L aquarium ontop of a four drawer Malm chest of drawers.