I have a 55 gallon tank that has been doing well for just over 2 years. I changed over from an algae scrubber to a skimmer 2 days ago and now things are dying. Yesterday I lost my shrimp and my Green Chromis. Today my Kenya trees are bent over shriveling and turning brown and my clown is acting funny. I've checked my levels and they seem fine. What am I overlooking?
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