HELP!!! Arowana just got gill curl

  • We are currently upgrading MFK. thanks! -neo
he has been doing a water change of 25 percent every couple of days still not getting better, ph 6.8 - 7 and nitrite and ammonia 0 his tank is about 4x1.5x1.5 and his aro is about 1.5 foot long so the tank isnt too small hes in the process of getting a 8x3x3 so what else can he do besides water changes?
 
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