Gah! I have deja vu from that last thread I visited.
Please share more about the conditions and your regimen. Looks like too much, of something. I could guess, but that isn't as helpful as one might hope.
Hungry. Without a description of your run down, we aren’t able to help. Medium? Light? pH? PPM feeding. Give us some info so we can try and help.
Burnz
Hey smitty ,
Need more info , but for sure my guess is heat issue first , by the heavy fox tailing and new spiral growth on top ....
Nutrient lock out
Usual suspects , don't get bummed out , it's a learning process , everyone goes thru it , and it makes all of us better growers .....