Arowana Showing Weakness

yesterday, we cleaned the aquarium just like the usual. The usual goes, taking off 30% of the water from the tank, scrubbing the walls, putting back a new 30% of water, adding one table spoon of rock salt and life goes on. The only thing I forgot was turning ON the motor for the filter. Air pumps were on. After 12hrs, my dad noticed the motor was off and he immediately turned it on. However, the Arowana is already showing weakness, instead of swimming around its tank, it stays in one place and its mouth keeps on opening and closing like grasping for air. We immediately did another 30% water change and it is still showing the same.

Please see the images below as I noticed some red bulging spots near its fins.



also, please watch the video I uploaded HERE.

Is this bad? or is it just because he was left with no motor ON and it scares out of him?

thanks guys.

Big Mike said:

I would do water tests ASAP.

Click to expand...

pH -> 6.0
NH3 / NH4 -> 0.1
cL -> 0

i'm thinking its a ticking time bomb because i have a10" arowana in a 32gallon tank.