Can anyone ID this green plant like looking thing grow on my rocks. It started about 2 weeks ago and its getting bigger. Right now it’s about half an inch long, looks kind of like a think leaf and there’s a lot of them growing. Would like to know if this is good or bad stuff growing. See pictures below…I tried to get the best shots with my phone. There’s also some dark dark purple leaf/plant like growing as well on the rocks and will get some pictures. I trying to learn whats considered good and bad things growing in my tank. Thanks.