EDIT: this tank is NOT appropriate for bettas, the filter is too strong.
the tank was really simple to set up, if you follow the instructions there should be no issues
There are several things that you need to know about this tank.
This tank can hold either one beta, or 4-6 (really) small fish
the upkeep of this tank if done the way suggested is EXTREMELY expensive. It runs around 145$ a year.
However you can bring it down to less than 50$ if you follow these guidelines:
(I've added links to the products I mention on amazon, but if you want to save money buy them at the pet store)
a) DO NOT BUY MORE THAN ONE EXTRA FILTER AT A TIME. The filter for the biorb is pretty simple, it is a plastic canister filled with a blend of activated carbon and zeolite cristals topped with a foam ring. Instead of buying a new filter, the old one can easily be reused by washing out or replacing the foam insert and replacing the crystals with a generic blend from petco (the 10$ bottle should last at least year)PETCO Activated Carbon and Zeolite Crystals
b) replacement cartriges come with two different packages of chemicals, one is to make tap water safe for fish, and the other is to cultivate the bacteria needed to keep your tank clean.The first can be replaced by a bottle of tetra aqua safe plus (you can buy this for around $8)
Tetra 8-4/9-Ounce AquaSafe Water Conditioner with BioExtract. The company that makes the biorb buys alot of their supplies from a company called API. you can buy a bottle of the bacteria booster at petco for around 10 - 15$ (it's called stress zyme
Aquarium Pharmaceuticals Stress Zyme 16oz)
c) if your bulb and the replacemment both die, the halogen bulbs are generic and can easily be purchased from third party vendors
THE GOOD
1) this tank is great for beginners
2) It looks AWESOME
3) fast setup
4) It looks AWESOME
5) easy to clean
6) the 5 step filtration system keeps water clear for several weeks
THE BAD
1) the tank does not come with enough ceramic media (the stuff at the bottom of the tank) You need to buy more. it also doesn't include any plants
2) older models of this tank came with a noisy air filter, this filter has been replaced with a much quieter one in newer models.
3) the bubbles from the air filter cause water to splash all over the top of the tank, this forms water droplets all around the tank above the water, this looks really unappealing and short of removing the air filter, I have not yet found a way to solve this issue.
4) the curved bowl acts as a magnifying glass, enlarging everything in your tank. it also creates blind spots.
5) If you leave the tank in direct sunlight the shape of the tank could act as a magnifying glass and set your desk on fire. =)
6) some people claim that fish get sucked into the filter, as there is no suction in this tank period, I believe their fish swam in. There is an optional air filter guard to prevent this from happening