Has anyone had to treat for HITH and discovered very high nitrate reading? My red tiger Oscar (HANNIBAL) has developed HITH and I have been medicating (Melaflex) him for 2 days now. Before the Meds the reading were normal. Now they're at 8.0. I retested and got the same reading. Not sure if because the Melaflex is an all natural extract from tea trees it would cause this. Would anyone have any sound advise, it would be most appreciated.