no sadly you need to redo it. usually the leak is so small you wont EVER notice it as i have let mine run like that for a month to see if it works its own self out.
what i would do if i were you is this. as a last chance before taking the piping apart.
power off your canister(s)
close the intake on it...and push the priming button 3-4 times and then keep it pressed down while closing the output.
disconect your canister ...empty all the water out.
connect it back up and ONLY open the INTAKE...give it a few seconds and then open the output...youll see massive bubbles come out as your canister is filling with water.
as its BUBBLING pump it a fdew times aswell and then plus it in or power it on.
if you still see bubbles after 30 minutes it is DEFFINATELY your piping and it MUST be redone.
for me to get rid of this problem i did this.
EXCUSE THE MESS IM IN THE PROCESS OF MOVING THAT TANK INTO ITS OWN ROOM AND INSTALLING A SUMP FOR IT.
as you can see its not the neatest thing but in 6 months its worked like a charm...no noise no bubbles no problem...
90% chance however is it is an air leak so good luck with it and let us know how it works out.