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I have a tank with 6 small crayfish, biggest still less than 10cm in length, not including claws. I think they are probably Cherax quadricarinatus? Not sure? They are a blue-ish brown-ish colour, with small red/pink spots on their tails, two on each segment. The biggest one has also just...

Oh no no my fish is only about 15-20cm right now. He's still small. Plus this sort of arowana only grows to about 0.5-0.6m in length. So the issue is not the tank size.

I will try the water change, though i am not sure if it will work... It looks more like it has some sort of injury since it has a problem controlling its body. For the water change, will adding some black water help? And would moving it to a smaller tank be better? Also, though the fish seems...

Unfortunately, i do not maintain the tank myself, so i do not have the test kits with me... The tank is about 1.5mx0.6mx0.6m, has been around fir many years, but was set up to house this arowana for about 1.5 to 2 years now. The only tank mates were some sucker fish to clean the tank up. I feed...

I have a red tail gold arowana and i think it is dying. I noticed that its appetite has not been good the last few days and that there seemed to be something wrong with its eye yesterday. But today, one of its eyes has gone red. The liquid, that should be clear, in its right eye has become a...