Red Dot On Male Betta - Cause For Concern?

Do you mean the red dot on his fin?

It looks as though he has damaged the fin, or perhaps even the endler bit him. But because finrot can start like this, keep an eye on it for now but be prepared to act if it gets worse. If it is a wound it will get better by itself. A few extra water changes will help keep the site clean and hopefully stop any infection getting in if it is a wound.

Hmm it's still there it looks more like a spot, is that what a wound would look like?

Thanks Sue I'll watch and hopefully it heals soon

Glad to hear the spot has gone. Sometimes fish get things like this and we have no idea how they came or how they go.

Flaring at reflections in the tank wall are quite common. It's the reason I don't use the shiny black background that came with the tank. The only way you can stop it is to put some decor in the way. Flaring isn't bad for them, just when they do it too much they can 'blow' their fins ie the fins get holes in which can lead to finrot if the raw edges get infected.

Unfortunately it looks like my Betta is dying and I suspect will be gone by the end of the day. 

My endler that was looking a little long in the gills died a few weeks ago but my Betta and mystery fish seemed fine. No problems with the water etc. 

Anyway two days ago I couldn't see my Betta in the evening and yesterday he was curled up in the corner. He's still alive but camping out in his cave not looking good.  Not sure what happened :-/

Thanks fo that Sue. Unfortunately we things have gone from bad to worse...

My betta is still alive but only just, I know I should put him down but I can't face it. He sits all day at the bottom of the tank, but every time I think he's gone when I put the net in to fish him out he darts away..

My only other remaining fish is now very sick. He's not behaving in the same way as the Betta but he's swimming with his head floating above him almost and the rest of his body dangling down until he gets blown into the filter current back down to the bottom. He's swimming really hard but to no avail. His head is very red and his stomach looks quite white. He was fine yesterday swimming around happy enough...

I think it would be best if I put down both of them...

I just don't know what's gone wrong. And once both of them die my tank will be empt except for an assassin snail. I don't want to get new fish in case there's a disease or something in the tank but I haven't seen any obvious signs... But I don't want to leave my tank and start all over again either :-(

Thanks for the advice    I'm going to be away for a couple of weeks again after the weekend as I need another operation unfortunately so I guess I'll give the tank a few weeks to clear and possibly do a cycle when I get back. My partner is happy to feed the fish but I think he'd object to changing the water for our snail!

I did a quick search and found this page with the symptoms, causes of diseases in Bettas and the suggested remedies:

http://www.bettafish.com/showthread.php?t=73332

This passage seemed to ring a few bells, perhaps it sounds familiar:

Stress
•Symptoms: It’s hard to say for sure. But maybe your betta is lethargic, not eating, hiding, staying in a corner or at the bottom of the tank, he might look a bit pale or dart away when you get close to the tank. It could be a mild infection of some sort though too so be careful.
Treatment/Prevention: If your betta is housed with other fish then isolate him and see if he get better. His tank mates might be harassing him. On the other hand, some bettas become depressed when isolated. Other causes could be too much or too little light, too much current, too much activity near the tank, the temperature might be too low. Try changing things up, move the aquarium to a more isolated area and see if he gets better. Or if he’s on a food strike, offer live foods. If he is lonely, place the tank where he can see other fish. Make sure there are places to hide when he is stressed.

I hope it helps.