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The BiOrb retailers recommend at least 24 hours, and I would say definitley no less time than this. I was advised at 3 days, and I have now had 3 fish in my BiOrb for 2 weeks with no water or filtration problems.
The biorb fish tank is made of glass or plexiglass like other fish tanks, except it has a ceramic filter inside so that when the fish uses the bathroom, it sucks it out quickly.
BiOrb aquariums can be purchased through Amazon and other online retailers. I am sure your local petshop would sell at least one variety of BiOrb aquariums.
Petco has them, so I'm sure Petsmart does as well. Amazon also has them. There is also an online store called Everything Biorb that has them, as well as a store Biorb Fish Tank, which is also online only.
I am not sure of the absolute mathematical sizing, but I can recommend my 4 gallon tank which I think is one of the more convenient sized ones. I have a 30cm by 30cm round fish tank made by BiOrb - it is a baby biorb.
It depends on how much water and how pressure is on the tank.
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With or without a heater they are not suitable for keeping any kind of fish in. The 3 basic rules of fish keeping are :- 1 inch of fish needs a minimum of 1 gallon of water. :- every fish tank need a permanently running cycled filter. :- every fish tank needs to have at least 50% of its water replaced every week. If you follow the above three rulles you and your fish will stand a chance of success. If you fail in keeping them I can guarantee you will be constantly having problems and be buying replacement fish.
Your fish will be much happier if you change at least 50% of the tank water every week.
It depends on the type/brand of conditioner, and how much water is the Betta tank can hold.
Exactly 30 US gallon.
Salt Water Fish