Basically I have read bowls are bad. I was unaware of this. I set up a bowl (no fish yet) as follows: the bowl is 3.5 gallons and it is globe shaped. I put an undergravel bowl filter in. I removed the filter cartridge and I modified a whisper 3i filter to fit on the the tube. I have aquarium gravel covering the filter by 1.5" and I have a live plant(It looks like Diandra, but I am not sure) in the middle. So right now I have this bowl sitting on my desk filtering and has been for two days. However, there is no heater and so the water sits at 70 almost all the time (it fluctuats 69.5 to 70.5). Originally I was going to put a beta in there, but found that betas need heat. So I thought I would put a paradise in there. However I then read somewhere that the globe shape is bad. So my question is... am I out of luck?