milla said:Re : heater
The tetratec uses 16mm internal tubing so go for the external heater that fits otherwise you will experiance a drop in flow. I believe this is the 300w hydor.
Yes, the 200w has 12/16mm tubing and the 300w has 16/22mm tubing. The tubing on the EX1200 is 16/22mm as far as I'm aware (the EX600 and 700 have 12/16mm tubing).