I’ve been struggling with water parameters lately. added several plants, flourish root tabs to sand substrate, and dosing Seachem comp/excel/iron and since then my parameters went haywire. Ammonia and nitrite spikes over the last 2 weeks but, not higher than 1 ppm at any given time. Doing frequent water changes and adding stability and prime to compensate. While this was happening I was focusing more on my fish But, this morning I noticed brown spots on my ghost shrimp and one looks like he has “fin rot”. Posting a picture of the shrimp below. Is this rust disease? And if it is can it affect the fish?