Originally Posted by 72olds455
The 2 ways that have worked for me are using an empty water bottle to squrit water into it, and a better way is to flip it upside down and put some plactic over the ends held with rubberbands put it in its place then remove the plastic.
Sorta my trick as well, but I just take plastic wrap and (Reynolds wrap) it will cling automatically so no need for rubber bands, but I take the U tube and submerge it in the tank and tilt and flip it upside down underwater to get the air bubble out, and while still submerged I put a piece of plastic wrap on 1 end and then double check air is out and put the other piece of plastic on the other end, and then place the U tube in it's place and once in place take the plastic wrap off the end closest to you and then take the plastic off the end farthest away from you and should start........