Originally Posted by furryeggs
I'm using a Hydor ETH 300 on my 70g and it works a treat, sits at a constant 24 degrees since installation in november.
The hydor 300w is great I just to run 2 one on each of my pro 3
Hydor make 2 the 300w and a 200w each has a different hose size
The 300w is 16mm
The 200w is 9-112mm
The 300w is great but the 200w does have problems no idea why