I asked and it was said by freddy that it wont work. So Im a little worried about what I should do.Without the jewel I have a tank with 3 otos in it, and to my surprise a black tetra, in excellent condition, that I dont know how survived or where it came from, I thought I gave it to my friend, on top of it all Ive had it for 3 years. I divided the tank into a 6 gallon, black tetra, and 14 gallon, jewel, to give myself time for my decision. So stocking suggestions would be interesting to hear. As for the co2 testing, which I am confused how to do, or anything for that matter involvoing the tank, midterms came and I have become very busy, to much hw.