Blue's tail damage was majority from fin rot...as said in prior post.
Red has never "shredded" Blue, nor has the new females that have been in there for near 2 weeks. Only tail pecking witnessed was during mating, and a nip or two when the peaking order of the 3 new females being introduced was established...non being life threatening or they would not be together now.
To see what I mean, I posted a video + pic of Blue in his 10 gal tank before I got Red, showing his first/ bad case of fin rot that he was still recovering when Red was introduced...Ill restat that they did
in fact have a divider at first, for nearly 2 weeks. Reason I removed it: they wanted
to be together! 3 days in a row after 2 weeks of the divider they would hop the divider to be with each other...no signs of aggression or wounds]
Blue fin rot video
Blue finrot pic
[I had never dealt with it before when took video, so was a bit unsure at time...luckily cause was determined, and after a few attempts, found a water combination that didnt result in fin rot]
People can believe what they want, and what they do with their fish is their own buisness...I know my Bettas are fine together, therefor when people state that all Bettas cannot live together it's just asking for someone like me to replie to counter your statment, proving you wronge.
I like to go to Betta Talk
oftin for majority of my Betta information. It is run by a Betta owner / breeder that has many years of experience [quite the list actually] and even had been approached by names such as Animal Planet for Betta info / documentaries or interviews / videos.
I think those who disagree with pairing Bettas needs to read the info in this link: original link
(Chicklet, you should find this interesting with your failed combined Betta sex tank:
A breeder friend of mine was marveling at my large 60 gal community tank, housing about 40 adult bettas, mostly females but also three large males. He couldn’t believe they weren’t killing each other!
perhaps you should look into these types / species of Bettas!)
The 3 main things I'd like to end this post with and thought people should read was:
-Peace definatly in my tank...pecking order established!
When kept in a community tank, bettas will establish a pecking order. One dominant fish will boss everyone else...usually a large male or female...known as the “ALPHA” fish. As long as that fish is in the tank, there will be pretty much, peace. Remove that fish, or add new bettas to the tank, and the pecking order has to be established all over again. Fights arise, bettas fins are frayed, and for a week or so, the whole fragile balance is threatened. Eventually, it settles down, and peace returns.
-Blue and Red showed signs of this today during water change, when removed into their own bowls, seperated from each other and main tank while water temp warming.
Bettas, as I said have their personalities and their moods. They even experience depression. A betta that has always lived with other bettas and suddenly gets jarred might go into depression if isolated. A male who just spawned and was pulled out of the spawning tank will often “sulk”. He will let himself starve to death.
So there you go. There is a lot more to bettas than you thought.