Is a powerhead good to put in a arowana tank? I heard that the stronger current that it makes will make the arowana stronger.
I use two maxijet 1200's with 2 hydrosponge 5 each for mechanical filtration. The maxijets make a lot of flow for their size. I also used a Hydor Koralia 4 for a while which also worked well and used very little power. I removed it because I had plenty of current from my 3 canister filters and sump return.
I would like to reduce the surface agitation from the canister filters for my aro but I have 2 rays that like the extra oxygen. How much turbulence do you think is required to fully saturate the water with oxygen? I could connect them to spray bars instead of a jet to reduce the linear flow. My aro seems to sometimes damage his scales and I think maybe the surface agitation may be causing him stress. The water parameters are all good (80 - 100% water changes per week).
If I were you, I would use magjet 1200 (maybe wrong spelling)