I'm looking to treat my fancy goldies to a lovely new oxygen pump for their 125 litre tank. I was given my first oxygen pump 2nd hand and unfortunately it doesn't have any manufacturing name on it and I'm scared to turn it upside-down and look on the base because if an oxygen tube falls out of it, it's a PAIN trying to wedge it back into a hole! >.< It's getting old now and it isn't doing as good a job as it used to. I would like one with two holes or maybe more? If there are any especially good brands I should be looking out for (or any to avoid!) do tell me. :3 Thank you so much my fellow fishy lovers! - S.