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NO Nitrates

423 Views 6 Replies 5 Participants Last post by  Lew93b
So, I set up a 55 gallon for a local school with zebra danios. mollies, guppies, kuhilli loaches, cherry shrimp, and neon blue gourami's, the other day the teacher told me that the shrimp were dying. I had them test the water with a master test kit and they reported to following, 0 ppm Ammonia, 0 ppm Nitrite, and 0 ppm nitrate. this shocked me as i know that they have been topping the tank off and rarely doing actual water changes so i asked them to test it again expecting to see nitrates. They retested and sent me a picture of the test and still got 0 across the board, at this point I went down to the school with a new master test kit and tested the parameters and got the same thing twice and got a ph of 8.6. is it possible that without plants something in the tank is eating nitrates? Also, there is a large piece of driftwood in the tank so i expected a lower Ph reading any ideas on what's going on with that?
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I recently tested again and got a ph. of 8.2 and 10 ppm nitrates I tested the source water and got ph7.4 before and after degassing the source water with no ammonia nitrites and nitrates. I am still not sure what is happening to the nitrates as they should be much higher with the stocking levels and the timing of water changes on this tank. But it is working so I am not going to fuss too much over it. it is filtered by a pair of sponge filters each sized for a 120 gallon tank.
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