Tanks Ben up for six months my ammonia:0 phosphate:0 nitrite:0 nitrate:0 ph:8.2 calcium:460 kh:179 so all perimeters are good and every day it's open almost all the way besides it looks like if u put a rubber band around it in the middle like a figure right shape so the middle of it mostly stays close together but still it all still bubbles up and looks perfectly fine.
This is why we really need all info or pics, I'm guessing this is a bubble tip that may be just splitting.