If youve removed the 90`s that are in the base of the skimmer, try it first before you cut anything down.
The bubbles are going to take the easiest way....and right now that is going straight back up the injection tower...that is why it spits too.
The size of the reaction tube right now has nothing to do with the problem... if you cut that tube down, it will be a smaller tube, still with no bubbles in it.
It doesnt matter what the height of the reaction tube is...you can place the water at any height with a valve on the output of the skimmer.
dont worry about bubbles in the sump right now, baffles and buckets and bags can be used for that, atleast the majority can just rise up the reaction tube instead of getting stuck in the injection tower.
Marc.
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Confucious say : Things that come to those who wait, will be things left over by those who didnt.
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