Wow it amazes me so many people still use the in tank heaters. My first choice in heater is my Hydor ETH 300watt heater that is in-line with my canisters. Holds the temp perfect and I dont have to worry about fish burning themselves or my large fish breaking them. Give the tank a much more clutter free natural look. I use two of these on my 120g.
My second choice would be the Rena since it can also double as the intake for a canister and still give a nice clutter free look.
My second choice would be the Rena since it can also double as the intake for a canister and still give a nice clutter free look.