The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
if you use addaptors to make it fit youll louse water preasure.. if you cut it in half youll likely have a leaking mess (if I understand you correctly)
Its best to have the correct size tubing..
I always cut my tubing to fit... i don't know how it would leak, the tubing usually comes really long and i just cut what i need and put it where i need it.