Betta behavior change

My betta Arnold has started to hide all day whilst until now he has slowly circled his 10G tank. He looks fine and eats his food ok. Although I am experienced as a fish keeper I am new to Bettas, he is my first one and I have had him a few months. Does this change of behavior seem normal for bettas or not?. His only tank mates are 3 nerite snails and 6 x-ray tetras. They have all been together since I got him.
I tested the water today and it's not changed from the norm.
They are
Ammonia 0
Nitrite 0
Nitrate 2.5-5
PH 7-7.5
KH 5
GH 6
Temp 25.4C
Chloride 0.
Any thoughts gratefully received.
The tank is well planted with both live and silk plants and an Indian almond leaf. with a low power trickle filter and an airstone turned right down to just a few bubbles so the waters flow is pretty low.

 

My betta Arnold has started to hide all day whilst until now he has slowly circled his 10 gallon tank. He looks fine and eats his food ok. Although I am experienced as a fish keeper I am new to Bettas, he is my first one and I have had him a few months. Does this change of behavior seem normal for bettas or not?. His only tank mates are 3 nerite snails and 6 x-ray tetras. They have all been together since I got him.
I tested the water today and it's not changed from the norm.
They are
Ammonia 0
Nitrite 0
Nitrate 2.5-5
PH 7-7.5
KH 5
GH 6
Temp 25.4C
Chloride 0.
Any thoughts gratefully received.
The tank is well planted with both live and silk plants and an Indian almond leaf. with a low power trickle filter and an airstone turned right down to just a few bubbles so the waters flow is pretty low.

How old is he? They naturally get slower and calmer as they get older, and this can happen quickly. Since it’s been a few months, he may have realized that he doesn’t need to fight for food or Territory.

 

I got him a few months ago, I don't know how old he was when I got him but he was full size.

 

I got him a few months ago, I don't know how old he was when I got him but he was full size.

Due to covid-19 I think that it is possible that companies are adding more chlorine/chloramine to the sources. But I feel as though that would affect your bio filter and cause an ammonia spike... Did you change the lighting recently?

 

Due to covid-19 I think that it is possible that companies are adding more chlorine/chloramine to the sources. But I feel as though that would affect your bio filter and cause an ammonia spike... Did you change the lighting recently?

No change of lightning. I had heard rumors that they may change the water chemistry because of covid -19 but was unsure how, more chloramine makes sense. I have tested the water before doing water changes but the only test I have for chlorine / chloramine is some strips and I don't trust them very much. I did however test the normal parameters with a liquid test kit and nothing seems to have changed.

 

No change of lightning. I had heard rumors that they may change the water chemistry because of covid -19 but was unsure how, more chloramine makes sense. I have tested the water before doing water changes but the only test I have for chlorine / chloramine is some strips and I don't trust them very much. I did however test the normal parameters with a liquid test kit and nothing seems to have changed.

Well, if all parameters are truly okay, then just monitor his behavior and try changes some things very slowly (like filter flow, lighting etc). I can't tell you why he is doing this, but have you looked for possible tiny parasites? Have you tried a de-stress medicine or something like paraguard? (IME, paraguard is magically good at eradicating ick, fin rot, you name it).