First grow any tip please??

im doing my first grow ive helped friend with theres before but thats it ive already had loads of great tips and help from the people on here can anyone else give me some tips for getting better yields etc im growing 15 plants with 600w hps light im using coco canna 2 part feeds and a coco canna bloom in the last weeks of flowering im also use the homemade co2 setup now which i hope works, im growing in 15 litre pot and hand watering for the first grow, any tips please thanks guys

that sounds like good lighting for them girls jus. remember when adding co2 it increases yield and growth so theyre ganna need more water n nutes since they will be busting out also need to keep the temp. around 80 85f you know they love humidity

thanks mate hope my girls grow well ill keep you all posted

your on your way dude