I dont run a skimmer on it. Just what I listed in the post. The fixture is a deep blue fixture with 2 T5's. And I havent tested the water in over a year. But I truly credit the water being clean from the xenia.
+1 on that. Xenia thrived in my tanks under PC lights with no skimmers and infrequent water changes. Same with kenya tree and frogspawn, though the latter would have probably had better color under T5s.