Baby Bettas changing colour - disease or natural?

HI - so I have a little problem... my Bettas live together happily in connected tanks, and in the last 1 month I have had baby Bettas popping out of the woodwork! The current count is about 11 babies, and up until a week ago they have all been similar colours.
A week ago the largest baby developed a small white patch on one side (it looks like he leaned against a rail with wet paint!) and the patch has only grown at the same rate as he is growing. I originally put it down as a natural colour change as he is the biggest, but the patch has not changed at all...

Then 3 days ago another smaller baby had a white patch on the top of his head... I started to worry that it might be disease since he is nowhere near as big asthe first one, and dosed the tank with disease solve.

Checked on them this morning, and the second one now looks like he was involved in an explosion at a tippex factory!
Is this natural colour changes, or do I have a problem? They all seem to be happily swimming around and eat like pigs, so I am scratching my head wondering why the changes would be so different if it’s natural!
The first photo is the younger (explosion) one, while the second photo is the oldest with the patch, and a convenient sibling to show the size difference!
The yellow tinge in the water is from the medication




Any help would be appreciated...

 

The one in the top left photo is definitely just marbling (natural colour change).
I'm not so sure about the other one with the white saddle (mostly because the size, colour and location match up with a known disease) but seeing how his brother is marbling with the exact same colours I'm going on a limb and saying that the location is just coincidence and giving the timing, he is also just marbling.

 

Thanks- it definitely takes a load off my mind! The patch one is only on one side of the fish - if he turns the other way you can’t tell him from the other 10! I just started worrying when the patch didn’t change after a week... when I originally saw it I first thought he managed to annoy Daddy so much he go bit!
(Daddy is so mellow I sometimes suspect his breeder was smoking a little too much weed in the fish room!)

 

Thanks- it definitely takes a load off my mind! The patch one is only on one side of the fish - if he turns the other way you can’t tell him from the other 10! I just started worrying when the patch didn’t change after a week... when I originally saw it I first thought he managed to annoy Daddy so much he go bit!
(Daddy is so mellow I sometimes suspect his breeder was smoking a little too much weed in the fish room!)

Haha!
Well I would say about 75% certain it is natural. It has a yellowish sheen (rather than paleness/washed-out white) and seems to follow the scales' pattern, so I don't think there is a cause for you to be alarmed.
I see you put your tank size in L, you wouldn't happen to live in the Netherlands, Belgium or Germany would you? I think I would give quite a bit to get my hands on some of those mellow betta offspring!

 

My Betta had a solid blue body with snow white fins. Within 2 months, he is almost solid blue. This is normal as betta fish mature. If in doubt, I'd check with a reputable local tropical fish supplier.

 

Thanks.

I live in the uk - Daddy is actually so mellow that he is happy to live with another boy as long as it is understood he is King Of The Tank!! He spent 9 months sharing the tank with another younger boy as well as his own girlfriend, until it grew up and tried to take his crown... I had to get the young upstart out of there when he wouldn’t learn his lesson!
As it is, the King is sometimes used as a toy or climbing frame for the babies and he just sits there looking at me as if saying “are you gonna do something about this?”

 

Thanks.

I live in the uk - Daddy is actually so mellow that he is happy to live with another boy as long as it is understood he is King Of The Tank!! He spent 9 months sharing the tank with another younger boy as well as his own girlfriend, until it grew up and tried to take his crown... I had to get the young upstart out of there when he wouldn’t learn his lesson!
As it is, the King is sometimes used as a toy or climbing frame for the babies and he just sits there looking at me as if saying “are you gonna do something about this?”

Too bad, getting to the UK and back is not nearly as easy as any of the other bordering countries That would be a bit of a costly fish.

 

Thanks- it definitely takes a load off my mind! The patch one is only on one side of the fish - if he turns the other way you can’t tell him from the other 10! I just started worrying when the patch didn’t change after a week... when I originally saw it I first thought he managed to annoy Daddy so much he go bit!
(Daddy is so mellow I sometimes suspect his breeder was smoking a little too much weed in the fish room!)

Sorry, decided to edit this out! Funny though!