How do you know betta's filter current too strong?

I don't know what "too strong" would exactly look like enough to stress him out.
He does swim around his new filter exploring

but his black/blue plant (the tips) are moving a bit in the water
the water isn't swirling but you can just see the debris floating around in a swirl
He seems to be able to swim but prefers to stay in the front near his thermometer

How would I know when it's stressing him out?

Bettas DO need filtration. It's a myth that they don't.

Staying in 1 place is a sign the filter is too strong.

Also the current will "blow" him around the tank like the debris.

What to do?
Use a piece of plastic to block the outflow of the filter. You can redirect it so it flows under the gravel.

Get a smaller filter. Undergravel filters are actually best.

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Blue Thermometer Swimming Article

Fish Supplies

Fish supplies are necessary, whether you are planning on keeping one fish, two fish, a red fish, or a blue fish. Tropical fish require a lot more for them to remain happy, alive, and well.  Tropical fish supplies are designed to help you do that. Fish supplies can describe any number of supplies that you will use to maintain your tank. For example, if you want your tank water to be clean, you need to keep a good supply of chemical cleaners on hand. These cleaners are available at most pet stores, and do a great job in keeping the water clear and healthy. They simply dissolve into the water and the chemicals rid the tank of harmful waste and debris.

There are fish supplies for almost anything it all deplaned what type of tank you have. To setup a saltwater fish tank you will need basic fish supplies such as: Aquarium substrate such as live sand or crushed coral, Live Rock, saltwater mix, heater, Aquarium filter (such as sump), Protein Skimmer, Saltwater test kits,  Aquarium vacuum, Aquarium Glass Scrubber, Two, clean, never used before, 5-gallon  bucket ,Aquarium thermometer. If you want to keep a healthy freshwater tank or tropical fish tank you will need some basic fish supplies, the first fish supply will be filter, this works greatly in ensuring the tank is kept clean and clear of waste and debris. Tropical fish are used to swimming in warmer water so a tank heater will be needed to keep the water in your tank at the proper temperature. Other fish supplies such as Aquarium substrate, freshwater test kits, Aquarium vacuum, Aquarium Glass Scrubber, Two, clean, never used before, 5-gallon bucket ,Aquarium thermometer are needed too. Any of these supplies can be bought at your local pet store.

Unlike the marine aquarium, the main purpose of reef tank is to house various types of fish; the true stars of the reef tank are the coral and other invertebrates. As the aquariums we maintain contain more and more diverse animal life, the need for more complete additives becomes more of a necessity, and the make-up of these additives has to be more geared to the new type of aquariums, in order to satisfy the requirements of all the animal life we now keep. Water movement is important in the reef aquarium with different types of coral requiring different flow rates. 

Building water momentum using a gyre is an efficient method to increase flow, thus benefiting coral respiration and photosynthesis. Some corals such as the Mushroom Coral very little light to thrive - conversely, LPS coral such as Brain coral require moderate amounts of light, and Small Polyp Stony Corals (SPS) such as Acropora Coral, require high intensity lighting. A reef aquarium requires appropriately intense lighting, protein skimmer wave box and other saltwater fish supplies are needed to. If you have a true aquariumpassion you know how much fish supplies are essential.

There are also fish supplies for plants tanks, shrimps tanks, Nano reefs, ponds etc... Any of these supplies can be bought at your local pet store.

About the Author

Rotem Gavish is a fish expert.  Dedicating his life to this beautiful hobby, his expertise is in all related to aquarium world such as fish, plants and invertebrates. Rotem established his site with the vision of sharing tips and free information.

 

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