Hi, I just noticed these light blotches on my plecco's side. I've never seen them before. He's eating normally and active. The only recent change to the tank was the addition of some Pothos plants to lower the nitrates.
I actually just did a water test to ask about this and I have an ammonia spike. The tank is cycled. I tested the ammonia on March 8th before the Pothos and it was 0ppm as it's been for months. Today, two days after adding the Pothos, it's at .5ppm.
I'm doing a 50% water change right now. Could the Pothos have caused any of this? I don't understand what just happened.