OK...with a seaclone you need to adjust the little air valve.....
close it all the way, and then slowly open it....for example...give it a small turn, leave it a day...then another small turn....etc.....etc...
AND ANOTHER THING>.......How old is your tank? Has it cycled? How did you get ich? to get rid of the ich...if you have no fish, YOU MUST Leave it empty (of fish) for 4-6 weeks
you really do not need a skimmer if this is the case