I purchased a Rio 1400 submersible power head / aqua pump second hand from a newspaper listing in my town. I talked to the guy and he seemed honest and told me it had no problems. I only paid 20 dollars so its no big deal if it is broken but i am worried it might hurt my fish.
I tested the unit first in my kitchen sink and it seemed to operate fine, i noticed it was a little loud, like a vibration noise, but since i had never used a pump like this before, assumed it is normal operation.
I placed a fluval water polisher pad( cut in half) in the grated box that fits over the intake and placed it in the tank. It seemed to run ok, besides that loud noise, and had good output with little heat.
It has now been in the tank for about a week and i removed it to clean and replace the pad. When i inspected the pump before removing it, i noticed alot of air bubbles coming out the output, even though there were no air bubbles coming into the intake. There is also an oily, dusty residue on the top of the water in my tank. To be honest, i don't think it was there before, but cant really remember. Its not like an oil slick from a leaky car, but is enough to cause me some alarm.
Upon removing the pump to go clean it in the sink, i noticed that the actual motor housing seems to have some water inside it.
This is the actual piece of the pump into which the ac cord runs into, and i'm pretty sure there isn't supposed to be any water in there, but i could be wrong, again i have no experience with these kind of pumps.
What i'm worried is that the motor housing has a leak which is not supposed to be there and has leaked potentially poisonous oil into my tank. My fish seem to be ok for now, but who knows what the effects might be.
i'm certianly not putting this pump back in my tank unless i can get several opinions from people with experience in this area!
The website for the Rio brand of pumps appears to be incomplete or broken, and i wasn't able to find any help there.
Thanks for anything you can give me, it is much appreciated by me and my fish!