yabadaba
Fish Crazy
I'm looking to buy a heater, or heaters, for my 496 litre ND Aquatics tank and quite like the idea of the external heaters. The only ones I ever see mentioned are the Hydor ones, but the most powerful one (300w) is only rated for tanks up to 300 litres. Is it possible/advisable to run two of these like you can with internal heaters?