Silver Arowana help

Hey guys;
I've been gone for 8 years ... Finally, got back in the hobby because my little son loves fish. Anyway, I have 3 small silvers in a 60gallon tank. And the biggest one out of the 3; stops swiming and sinks to the bottom. And I would think this guy would float already and die but just when I think he'll die. He'll start swiming and act like nothing ever happen.
I've never experienced this. What do you guys think its happening???

[stoner]

The most basic & common question comes to mind.....is your tank water cycled?

Wat abt the rest when this aro behaves such?

Originally Posted by Chandran

Wat abt the rest when this aro behaves such?

found out what wrong with my silver. Ph is too low, lost my clown loach pass 3 days been changing water 40% and added shell chips and nothing water is still at 5 to 6 ph .

My tap water is 7.5 with in 4hrs ph drops below what my ph paper can read, the lowest is 6.2

Originally Posted by Wraith

found out what wrong with my silver. Ph is too low, lost my clown loach pass 3 days been changing water 40% and added shell chips and nothing water is still at 5 to 6 ph .

My tap water is 7.5 with in 4hrs ph drops below what my ph paper can read, the lowest is 6.2

hows yor silver noW?

Originally Posted by Chandran

hows yor silver noW?

he's dying as well ... his tail is all messed up look like it he got in a fight ... He has been fighting not to die but today I think he's going to float...

I dont know what else to do ... I put coral chips in my fluval 405 ( replace the factory bio wheels) to help with the PH ... If I cant figure out what is going on with this tank ... I havent fed the arowanas I'm down to 2 arowanas thats ok but one is dying... Worst case scenario is take out the last 2 and re-do whole tank with sand or coral chips...

This is my first bare tank and I never had issues with ph dropping like this...

Try to put geo-liquid...it stabalizes PH...buy the old version of geo-liquid