I noticed this morning that my other red is not acting happy now (hiding, not eating) so I took my water in for sampling and my nitrites have spiked. Nitrates and ammonia are good, but the ph is 8.4.
I treated the tank with biozyme and am not sure what else to do next. (ETA: I also did a 50% water change before adding the biozyme.)
Any advice would be greatly appreciated. TIA.
Lisa