Hey Guys. I'd like to ask a few questions about my heater. I have a juwel 600 (63Li) tank which came with a 50w heater standard. My questions are as follows: 1) Would a new Juwel heater fit the filtration system I have? 2) Would a higher wattage increase heating speed or just allow higher temps? 3) What watt would be recommended for my tank as it struggles to maintain 77F when my room is cold. Thanks a lot!