hmm what are these are they safe?

[tornado0123]

Hey guys thanks for all the help i'm getting close my lvls are ph 8.0 ammoina ZERO nitrites are about 1 ppm hard to tell and my nitrates are 20 ppm anyway i was sitting here and noticed these 3 things this one is gray and waves to the flow

this one is a little spot

this one is little green almost like green grass sorry i dont have better pics

 

[fishmanfabiano]

cant really see in the pic what it is, but in my experience if it looks like a little black, brown, tan, or clear polyp, odds are its an aiptasia anenome. look that up and if thats what it is i can give you some tips.