Hi people! I am new here. I just started vaping 4 weeks ago and I have gone through about 4 clearomizers. After about a week of use I don't seem to get enough vapor. I was researching the Kanger Protank 2 and Im thinking of buying one but it seems expensive, unless the coils last long. What other clearomizers/atomizers/tanks should I look at and where can I get them for cheap?