PH / Joint hardness

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N

Nzero

Feeder Fish
MFK Member
Aug 7, 2010
125
0
0
Netherlands
Hello,

I was wondering what the ideal range in ph and joint hardness is for a Arowana.
My JH is 8 now and my ph is 7.7 but my aro's don't seem to like that.
 
Jardini and silvers aren't concerned with Ph or hardness in my experience. What kind of aros do you have? Why do you say they don't like it? I have never heard of joint hardness, can you explain what that is? I imagine we use another term in the US.
 
Ahhh i thought that in the US it was called joint hardness. I think you guys call it general hardness GH then.

I have 1 black 2 silvers and 1 snow in this tank and they are all suddenly laying down on the bottom of the tank most of the day since i boosted my GH. When i throw in some moth larvae or crickets its still a race who can eat it the fastest. So maybe its just because of a weather change or something.
 
Quick stats:

[TABLE="width: 396"]
[TR]
[TD="colspan: 2"]
Listed tank sizes are the minimum​
[/TD]
[/TR]
[TR]
[TD]Size:[/TD]
[TD]Up to 48 inches in the wild.(120 cm)[/TD]
[/TR]
[TR]
[TD]Tank:[/TD]
[TD]72 inches[/TD]
[/TR]
[TR]
[TD]Strata:[/TD]
[TD]Top, middle[/TD]
[/TR]
[TR]
[TD]PH:[/TD]
[TD]6.0 to 6.5[/TD]
[/TR]
[TR]
[TD]Hardness:[/TD]
[TD]Soft to medium, or dH to 8° [/TD]
[/TR]
[TR]
[TD]Temperature:[/TD]
[TD]75° to 86° f (24 to 30°C)[/TD]
[/TR]
[/TABLE]

Ph isn't usually a big deal to fish, but it may be your water hardness. Add some diftwood and plants, get a RO machine if possible, catch rain water, or buy softer water from market (may get expensive). As for Ph I have been successful keeping mine down to 6.8 with Fluval Peat granules in my filters. My water comes out hard and at 7.8 out of the tap..
 
Aro's prefer slightly acific water...around 6.4-6.8....as thats how their natural habitat,But this is for Asian could be applicable to silvers n jars

Sent from my GT-S5360 using MonsterAquariaNetwork App
 
Well first thing that you can do is decrease your hardness back to where it was and see if that changes their behavior. Personally even though arowana will adapt to higher pH levels, I keep mine at levels more like their natural environment. Ammonia is much more toxic at the higher levels of the pH spectrum. My tank has no ammonia and should never see any measurable levels under normal conditions. Things do happen and a lower pH level could someday be the difference of life or death for my fish.
 
i know its off topic but does anymone know if the higher ph most keep the silvers in maybe a part that causes drop eye

in the wild i would expect them to be in 5.5.6.5

probably been talked about before but hey

that quote you attached is wrong how can anymone be expected to keep a 4ft or even 3ft aro in a 72" tank

i bet that site quotes a 8ft tank for a arapima to
 
Interesting thought, T1
 
Thanks, I threw in a whole bunch of catappa leafs that must help to get some softer water!

What T1 says sounds interesting but my silver developed drop eye and my snow and black have nothing. So why is it always the silver Aro that gets the DE. I think it must have something to do with genetics. Maybe to much incest wile breading. I wish some biologist would spend some time and money and find out for us hehe.
 
it could be like some people get sun burn and other dont with the ph

i maybe wrong but from the location i would guess that jar and black come from a higher ph than silver

its another one of them things that so many ideas get thrown around that even if someone stated the right cause no one would beleive it and say yeah but
 
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