KentFishFanUK Posted July 28, 2021 Share Posted July 28, 2021 Ok so I've been thinking about my nitrate levels. I can't seem to keep my nitrates under around 40-50 ppm, which is the same as what my tap water reads as well so though I do some water changes they don't bring nitrates down. I have quite a few plants and I can only assume they are keeping up with the added nitrates from the cycle as my level never seems to go up but they aren't enough to get it significantly lower than what comes out of the tap either. Online I've seen massively differing opinions on what is a good or even safe nitrate level for fish. On average people typically say don't let it go above 40 but plenty of experienced people say they don't worry about it until it's much much higher. Aquascapers seem to suggest keeping it at around 20-30 ppm for plants. On a loach forum I've seen claims that nitrates over 10ppm will kill hillstream loaches, now I kind of saw that as a bit of exaggeration or them being purists - they also mostly suggest that hillstream loaches are only suitable for biotope set ups - than anything else but then my lovely little hillstream loach did die after around 10 days in my tank for unexplained reasons so maybe there is more to it? I've ordered a pothos and will see if I can use that to suck up some more of my nitrates before getting another hillstream loach but in the meantime I wondered what everyone else's thoughts/experiences with nitrates were? Does pH affect how toxic it is in the same way as ammonia? Or anything else that means 40 ppm of nitrates in one table/water is not the same as 40 ppm in a different tank? Can a high nitrate level be indicative of a different issue? Are some fish literally so sensitive they would die at over 10ppm? Is there another piece to the puzzle I'm missing? Is there a way to test oxygen levels? Is there another way to reduce nitrates? Link to comment Share on other sites More sharing options...
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