yeah deffo, my other one i replaced (was too low a wattage...stupid juwel) only got my tank to 26 degrees or lower.....which is why i replaced it.....can't treat ich with 26 degrees!
For £15 you can get a tetra tec 50watt heater that will bring a 55litre tank to 30 degrees C. I'm not sure on how reliable they are. I'm currently using 2 and never had a problem with them, but it was impressive to see one bring my old 55litre tank that temp.
the interpet deltatherm I got was £9.99....well even less due to my staff discount (which my shoddy company are trying to deny staff)....which I thought was good value for money, it's a thermostat heater so it's easy to control your temp, and it fits where my juwel heater came out of so I don't have to have it on view
if anyone would like to know the capacity to wattage size ratio just let me know and I will post it up.
Because my juwel came with too small a wattage heater for my tank size....skanky bums!!!!