Axie getting smaller and looking munched on after new axie added to tank

Hi,
I bought a new axylotyl about two weeks ago and added it to the tank with my existing axylotyl. The new one is much bigger than my existing one. Since then, the old one has been getting smaller, and is looking very small and frail today. Its tail also looks shredded and gills look like they have been partially eaten.
He is in the fridge at the moment. I will try to post some photos tomorrow.
Can someone please give me some advice?
Thankyou,
Dane Rhoades

[kapo]

Well, you shud really have quarantined the new one for 30 days. If u didn't have a spare tank, any plastic tub/container/bucket wud do as a temporary tank. Bit late in the day to say but the new axie may have passed something onto your older axie.

if hes much bigger than your old one i think youll just have to seperate them until the smaller one catches up. either by divider or seperate tanks.

the little one will probably do fine in one of those plastic storage bins, as long as the big one cant get to him and hes getting his share of food he should get back to normal in no time.

Thank you.
He is in a separate tank now and is beginning to look healthier. He is eating again now.
The new axolotl is a male.
Thanks again,
Dane.

[kapo]

Great to here that Dane!

Im thinking of buying another axie, (a lil albino "rose" for my dark boy "axl") but im scared of what can happen. I have a 3ft tank, its almost full (cos he really likes swimming) has lots of plants and we will buy another hidey hole for it when we buy it.

my concerns are A)unplanned pregnancies and B)attacking each other (axl is very vicious and attacks my fingers when i stick my hand in the tank)

If i get one from the same place as I bought axl is there a chance they will get along (will they remember each other?) and will it lower the chance of parasites? They keep all the axies in the same tank and breed themselves.

I would be very careful to make sure they are of similar size - I just made that mistake.
Fortunately, I think Ari will be alright with a little work - but you REALLY need to be sure and keep a careful watch.

You're best giving them quarantine for a month too - even from the same place, it doesn't mean they will have the same problems/lack of problems.