It can be a flow issue . and it is photosynthetic. i did nothing more than shut my lights down for 3 days to rid my tank of it. then added another PH to get some flow in that particular area. havent seen any since.
Your CUC is really doing nothing for this. aside from stiring your sandbed your cuc is really not feeding on the cyno.
I have never seen anything eat or manage cyno. this is just my opinion but what is taking care of your cyno at night is not your pods and such, but rather the fact that there is no light.
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72 Gallon Bowfront Reef.. Hardware:2x250w Luminex Elite HQI Reflectors (Phoenix Hexarc Bulbs), Galaxy 2x250w Electronic ballast, Euroreef 130 Skimmer, Sedra KSP 7000 Retern... Live Stock: Pair of Hawaiian Flame Wrasse, Leopard Wrasse, Pink Streaked Wrasse, Pair True Percula Clowns, Potters Angel, African Flameback Angel, Orange Fin Tomini Tang, Yellow Assessor, Tailspot Blenny, Purple Firefish..
45 G FW Asain Barb Community tank.
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