m0useanswered grow question a year ago Looks to me like they are getting to hot, taco leaves are a tell tail sing, 28c daytime with no fan is a bit much, need to keep the air moving and try and cool it down a bit. ....[][][].... RH at 45% is not ideal but is still within the range of normal in veg I like to see RH aorund 60%. ....[][][].... When growing in coir you should know it is void of nutrients and needs everything provided to it, that's macros and micros NPK CaMgS ZnFe exct.. without it the plant will suffer. ....[][][].... I think your lights height is on point now, its time to fix the feeding and get it watered. With coir and liquid nutrients you want some runoff to avoid any salt build up. PH can be between 6-6.4, there is no reason to have the PH so low around 5.8 as if something happens and the PH drifts then its much closer to danger zone of causing bigger issues. All hydro nutrients can be taken in by the plant in a range of aorund 5.8-6.8 they are readily available and work in a wide range, why limit yourself and titter on the edge of PH lockout. Use a TDS pen to get the EC or PPM of the feeding solution this will let you know how much your giving, can monitor runoff to ensure its not to much or to little. ....[][][].... Good Luck!