Thanks alot guys , it's really quite a pity, since I've had him the longest. Once I'm done changing the water and all that stuff, I'll be looking for either a latimanus or maybe an octopus (maybe a cyanea?) but that would probably be a bit too big.
I was thinking of switching it back to freshwater coz I kinda missed the arowana, but I think I'll just stick with saltwater.
That's why i only have a freshwater tank just now... I think ceph keeping can be a bit stressfull compared to arowanas etc... However, my friend still has 10 baby cuttles for sale... i could syphon out that freshwater in about 10 mins LOL