I used H&G Cocos base nutrients for 2 years. Good stuff, very concentrated. If I recall it's 1 ounce per/5 gallons of water to achieve 1.6 EC..
I switched to CYCO - DWC Chart due to H&G having ph issues in larger containers of coco. Inbetween feedings my roots were hitting as low as 4.6 PH and also their base is too high in nitrogen for bloom imo..