Zonlover
Jogging around the block
I've read some articles that say you can, but I am sorta skeptical. If it is true, then that would be great, but.....
Not to mention cheaper. I've had a bioactive tank in the past and it's a lot of time, work, and money to get them to flourish and find a balance!It would be very difficult to do so, and you'd have to have everything very controlled and fine-tuned. It would be considerably easier to just purchase the appropriate filtration and heating equipment.
Yeah even in my bioactive I still used a filter!If you chose naturally cold water species, like white clouds, zebra danios or goldfish (need huge amounts of space), you could dispense with the heater if your home is at room temperature.
The filter is much more dicey. The easiest way to ensure an adequate biological filter in an artificial environment is with a filter. The nitrifying bacteria also live on décor, rocks, etc., but most live in the highly oxygenated filter.
I'm unaware of any proof (there are some unsubstantiated claims that may be true) of anyone establishing the full nitrogen cycle in an aquarium, even large public aquariums. Most get ammonia > nitrite > nitrate. They don't get nitrate > nitrogen gas, as happens in nature.
Anyway, forgoing a filter would entail tons of extra work & likely daily water changes (enough but not too much), depending on the bioload of the aquarium. I'm not sure why one would bother.
The biggest one is always best5 gallon or 10 gallon for a single male betta? Maybe I should rename this thread: "Questions about every fish subject."