Gideyon Posted August 13, 2021 Share Posted August 13, 2021 (edited) I'm having problems. Brief history: This 10g used to home a betta at 75 F, pH 7.2, KH 40. The water always came from the tap. After he died, I tore down the tank. Bleached. Rinsed. Sun dried. Now I'm putting in a new substrate of baked clay (safe t sorb), with a little bit of laterite. Two small dragon stones. Water came from the garden hose. After a few days of getting rid of the finer particles of the clay, I added prime and a few hours later, I tested the water. 70 F. KH 0, pH 6, and there was about 0.5ppm ammonia, 5-10ppm nitrates. I did a water change, removing water down to the substrate level. Replaced with tap water. Ammonia is just a fraction above 0 (small tint of green that is lighter than the chart). Nitrates 5-10ppm. pH 7.2. KH 40. A couple of hours later, pH dropping. An hour after that, pH still dropping, now around 6.5. KH is still 40. What could be altering the pH? pH out of the tap is 7.2, but I haven't done a test after a few hours of sitting. The substrate shouldn't do this. The stones shouldn't. I wouldn't think laterite would. Could the water supply have changed that much? The nitrates are present in the tap as well at the same levels. That wasn't the case back in February when I was setting up the tank for the betta. I was getting 0 nitrates at the beginning. Why would KH be 0 in one test and back to 40 the next? Faulty test, or can KH be altered? Any suggestions? I'm not sure I can cycle the tank with the pH that low. Edited August 14, 2021 by Gideyon Link to comment Share on other sites More sharing options...
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