phil519 Got Rotifers? Premium Member Dec 21, 2009 #2 The 6100 is the tunze 6000 with the "hockey puck" transformers. The 6101 uses a newer different power supply. I have both pumps and both are flawless.
The 6100 is the tunze 6000 with the "hockey puck" transformers. The 6101 uses a newer different power supply. I have both pumps and both are flawless.
