My aro just died on me. Any ideas why?

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Plecostomus
MFK Member
Dec 26, 2007
560
38
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Antelope Valley
My 6" silver aro just died today. I found it just barely able to swim around as my aqua clear 110 filter was pushing it around the tank with its current. I took it and moved it to an established 15 gallon tank I had already set up for quarantine but, it died within minutes in the new tank.

Earlier this morning it ate just fine. It ate 8 pieces of hikari floating pellets. Hours later it was just barely able to swim in my 120g tank and would soon die.

Any ideas on what killed it? I had it for 21 days.
The first 10days I had it in a 10g quarantine and it was eating just fine as well. I even put some parasite clear in there with some melafix in the tank. I then introduced into the 120g with the other fish in my signature. While on ocasion the flagtail would chase it during feedings as did the yo yo loaches during feeding times they pretty much left it alone. It had no missing scales nor ripped fins some I'm doubting that it was the tank mates who killed it.

My water readings are as follows:

Nitrate 20ppm
Nitrite 0
150 hardness
110 gh
60 kh
6.5 PH

I was planning on doing a wc this weekend.


A month before, I had lost my 10" silver which strangely only grew 2" in like 6 months with daily feedings of market prawn and omega one flake and when I first got it, it was eating krill, fd shrimp and fd krill and frozen beefheart. It just started swimming really low to the tank and then I found it floating vertically head first.

Could I have some sort of parasite or illness in the tank that is only killing my aros? My stingray, dat and flagtail and loaches are doing just fine... I am truly baffled. I'd like to get another aro, but I'd like to find out what may have been the cause of death.

I'm thinking that since my 6" aro was still fairly new, it might have had something from before I even bought it and this led to its death.

Or perhaps the 2 silver aro deaths within 2 months are somehow related. It stinks... I've raised up other aros in the past which I've rehomed for various reasons. So I just don't know what got to this poor little aro.

Any thoughts? Thanks in advance.
 
it sounds like you change your arrowana from tank to tank, that seem harsh because i'm sure the water perimeter are different, and i dont like fish med, i just raise the temp to 80-82 F and run UV, that normally kills all parasite, than again i'm just a noob ;) just thought i share my experience, good luck though :)
 
I live in Denver where I believe the water is pretty hard however my pH seems pretty acidic. Man, I used to do 50% wc weekly before my new born baby came and my previous silver I raised up to about the 18" mark did quite fine in this tank. I rehomed him because he kept trying to eat my flagtail.
 
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lxxiv;3211847; said:
it sounds like you change your arrowana from tank to tank, that seem harsh because i'm sure the water perimeter are different, and i dont like fish med, i just raise the temp to 80-82 F and run UV, that normally kills all parasite, than again i'm just a noob ;) just thought i share my experience, good luck though :)

Yeah, you could be right, but I think he death was already at the door before I changed him to the 15 g. I did the same thing when I moved him from the 10g to the 120g. I just dropped him in and he did fine for 10days, eating 2x a day.
 
arowana actually dont mind water at 6.5ph... cuz in amazon.. the ph is 6.0 - 7.0ph...

I'm more interested your 125's tank bottom what is your bottom? Sand? Gravel Barebottom? If your using sand.. that is a big issue.... sand its bad if u dont have a good under gravel filtration system.... it traps food and rottens it...

You say that you feed your arowana pellet? Bio Gold? Maybe the pellets are bad... causing your fish to be sick...


Some pictures of your tank would be great...
 
IMG_0544.jpg

IMG_0495.jpg


It's a gravel bottom. I think though that if the water quality was bad that it would show up in my water parameters. I'm thinking the water is okay, it just needs a water change to control nitrates from getting too high.
 
to lower the pH of your water add some driftwood in your tank. i dont think changing the tank of your aro from time to time is a good thing.it only stresses your fish. and your 125g tank is only good for a year max i would say. the aro will grow out the tank soon. i dont thing it has anything to do with your substrate.i got sand in my tank as well and many guys on mfk have sand as their substrate. feeding pellets is a good thing. go for hikari. i dont see anything wrong you might have done. adding meds could have done some damage as you should only use meds if necessary. bad luck buddy, you lost 2 aros in such a short period
 
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