I brought home my new pleco on sunday, he was extremely active and sucking on everything. The next day I noticed he was laying on the bottom not moving much, very lethargic, and not sucking. I noticed a slight white line, semi fuzzy on his left side. I performed a %25 water change and kept an eye on him as I was unsure of what it was (ich, bacterial infection, or fungus). The next day I checked all of my water parameters i.e. ph, ammonia, chlorine, nitrate, and hardness and everything was perfect (still is). The white streak has grown a bit though my pleco seems slightly more active today. Does anyone know what this is??? Thanks.