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Discussion Starter · #1 ·
So the leaves on my Hygrophila corymbosa are turning a brownish red, starting to have spots, and growing a fine hair algae. Is this a nutrient deficiency, maybe my new lights, or API Nitra-Zorb filter media?

Tank is a 5.5 gallon, HOB filter w/ API Nitra-Zorb filter media, DIY CO2 (yeast/brown sugar), just added Finnex Ray II LED 16" 9w and also API Nitra-Zorb filter media. RO/DI water with weekly 20% water changes,

Parameters (Measured using API 5in1 Test Strip)
GH 30 NO2 0
KH 80 NO3 0
pH 7.5 Temp: 76

The plant was pearling when I first added the Finnex light, my NO3 was around 40, so I added the Nitra-Zorb which brought it down to O.
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