Koralia Killing My Fish?

Could just be change in water flow stressing them out, I have 2 koralia 2's in my 80 gal and added both at the same time. My foxface also stopped swimming and was breathing heavily. I unplugged one and let the other stay on for a week, then let them both run. Everything went smoothly after that. I may actually add a koralia 3 also because ive got a new one laying around. Also i do not have a ground probe.

 

I have my skimmer and poly reactor, and sump return pumps all submerged, along with a heater and 2 koralia 1's, and no ground probe. I haven't had any issues so far. My fish did act weird after I added the second koralia but they got used to the flow after about a week. They actually "play" in the currents occasionally now.

 

I had this same problem when I added my koralias. Pretty much had a full tank die-off. I use my voltmeter and determined that there was no stray voltage from my powerheads and never had any parameter shifts. It could have been just stress, but I will never find out. I had a thread on here about it somewhere.

 

thats what i wanted to know, thank you. i was just looking for feedback from a happy "customer"

as for the problem with andu, it seems more likely that the fish died from stress due to increase in flow, rather then a manufactor defect causing stray current...

 

So if it was stress from increased flow, how does one go about adding a new powerhead without these issues arising?

Should I be concerned with this issue as I add more fish in the future?

-AJ

 

Be sure to wash them before adding to tank. They can have junk/oils/other contaminents on them when purchased. I use three and haven't had any issues at all. I also have mine on wavemakers too. I have two switch off every 10 minutes and the corals love it. Hippo plays in it and clown aren't too sure but deal with it as long as their corals are happy.

 

This I believe is the more correct answer. I believe the instructions tell you to wash/rinse them before adding it to the tank. Fish, in general, love more flow. Ever see the reef on one of those nature shows? The flow is far greater than what most of us have.

 

A GFCI will not prevent stray voltage from entering your tank. A GFCI is to protect from grounding faults, i.e. when something shorts the electrical contacts. In our case, that is usually when water comes into contact with the plugs and recepticles. If a pump is leaking voltage, what it is plugged into will not shut it off. The outlet only supplies what the device that it is plugged into calls for, within the limits of the circuit it is connected to. A GFCI will pop off if it exceeds that limit.