I have been trying to combat a serious rise in Nitrates over the past two days. I have only one thought of what may have caused it, but need some advice. Two days ago I started seeing elevated Nitrates, maybe 10-15. Yesterday that number had climbed to 20 so I did a 10g water change. I currently have about 90g of water volume between sump and tank. Tested again but saw no change. This evening I test again and the number has skyrocketed to 80! The one thing I can think of that may be causing this is I had a snail die on me the other day. Before I even knew it, my cleanup crew had it out of the shell and was picking every scrap clean that they could find. Could this be the reason for the extra bioload? I see no increase in ammonia or nitrites. I changed another 5g today and need to check levels again. I have tested my new water and it is zero on the nitrates. Anyone have any ideas here? All of my other water parameters are acceptable, just too much Nitrate. Until now I never had a nitrate reading higher than 5. This tank has been setup since February after migrating from another tank. I have been fighting a cyano
problem for a while. Not sure if that has anything to do with it.