Quote:
Originally Posted by tang daddy
You have to adjust the sliding tube up or down.
That controls how high the foam head will be at the skimmer cup, wetter skim will be light brown, dry skim will be dark brown.
If I were you I would remove the sponge, I've never ran mine and try to skim wet, it may not be as dark but it will pull more nutrients out.
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When I remove the sponge it gets really noisy. I will try to skim wet