I was moving apache to his new tank today and i noticed a weird slime on the fake plant. It appeared over night. The slime is ONLY on the plant that i took from his old tank, which he's been in for about 3 weeks now. I didn't rinse it off before moving it to the new tank. The new tank has new substrate, freshly cleaned everything, and is entirely brand new.There's a difference in the pH of both tanks. His old one is around 7, his new one is around 7.8. Anyone know what this stuff is? Is it harmful to him? I haven't moved him yet.