Feb 2, 2017 - For many people, the fact that betta fish don't really need an oxygenation system is reason enough to conclude that a water filter is not needed.
I'm not sure if anything has changed since you asked 2 months ago, but I'll answer your question anyway. Your Betta's tank looks smaller than required for him to thrive, and I would recommend upgrading to a bigger tank, maybe 2.5 gallons in size at least. A heater is required depending on where you live, because Betta fish are most comfortable in temperatures ranging from 70-80 degrees fahrenheit. Also in my experience a filter is recommended, but optional if you are okay siphoning water out with a straw and performing frequent partial water changes. Pants such as Anarchis and/or Marimo Moss Balls help with water quality and aeration too.
Elive air operated Betta Filters were designed to filter water in small bowls and aquariums, improving the water quality, clarity and ultimately providing a healthier environment for your Betta fish. Each filter comes with either a plant or resin ornament that helps to hide the filter. Each Betta Filter includes a filter, ornament or plant, airline tubing, suction cup base, air adjustment valve and airline suction cups.
But I'm just wondering, what will healthier for the fish
I'm starting to clean the tank today and start putting in water
BETTA TANK Contrary to popular opinion a Betta cannot live in a BETTA BOWL or such similar sized tank. I would say the minimum for a truly happy Betta is 5 gallons. The Betta bowls or cute little containers they have come up with now are impossible to heat or filter and we will come to that momentarily, but Bettas are Tropical Fish and as such, need to be kept in heated and filtered water.BETTA TANK Contrary to popular opinion a Betta cannot live in a BETTA BOWL or such similar sized tank. I would say the minimum for a truly happy Betta is 5 gallons. The Betta bowls or cute little containers they have come up with now are impossible to heat or filter and we will come to that momentarily, but Bettas are Tropical Fish and as such, need to be kept in heated and filtered water.BETTA FILTER Here again, because the Betta is a Tropical Fish and especially because you love your fish and do not want to subject him to having to live in a sewer, you need a GOOD filter in the tank you will be housing him in. This means chemical, biological, and mechanical filtration - no undergravel filters (UGF). There are a lot of types of filters out there but not all of them are appropriate for a Betta. Bettas are not given to being in a strong current so you need to find a filter that is adjustable to the degree that it provides a ripple or small waterfall - not a torrent. They do like some movement to the top surface of the water as they are one of the Labyrinth fishes. These fish have an organ on the top of their heads that not only allow them to breathe air like we do, but demands it. So if dust, scum or anything else builds up on the surface of the water and the Betta is prevented from reaching a clean surface spot, he will drown. He also uses his gills so he can remain underwater for a time, but if you watch your Betta he will go to the surface and "butt" the surface with the top of his head, this is his "breathing air". A lot of owners provide a tall plant for their Betta to sleep in at night so they won't have to swim so far to "breathe".Most hobbyists and aquarium enthusiasts are familiar with the betta fish, a beautiful and elegant creature that is ideal for beginners and expert fish keepers alike. Now, we are also familiar with the fact that most fish tanks need a water filtration unit to keep the water clean and the fish alive. However there is some controversy when it comes to betta fish, mainly whether or not they really need a filter. We are here to answer this question; Do betta fish need a filter?