i can't control this red slimy stuff?

[redpuffer]

Is this stuff comming becausei don't have the right light ? or is it my calcum perimeters i don't know what it's from but please help me someone thank you

 

[bang guy]

Well... some specifics will help. Could be waterflow or excess nutrients or both.

 

[frozenguy]

if it is cyno bacteria, use chemi clean, got rid of mine in 1 1/2 days