I had previously bought a mini 7.5 watt Hydor heater when Fishy was in a smaller bowl. Now that I moved Fishy into a 5 gallon tank, it does not keep a steady temperature and I was wondering what heater I should buy? I saw some 50 watt heaters at my local Walmart, but I wasn't sure how good they were and I wanted to get some opinions on what heater I should buy. I am looking for something that it not over-the-top expensive that will work great to keep the tank at a steady temperate without overheating him or freezing him. I am not entirely sure what wattage I am looking for, I was sort of going off of the boxes that say the gallon capacity.
Also, there are a couple pet stores in town that carry some aquatic plants. I am seriously thinking about starting to put some plants into the fish tank, but I do not know anything about aquatic plants and what kind of light bulb I would need to buy in order for them to live. I would really appreciate any and all advice or tips on plants.