I used the kit for same recipe... got 3 boxes of it for free so i used em last grow. They worked great. I would make 6 gallons of nute solution with air stone in it and cover. I would use nutrient water, tap water, tap water and start over... when i were about halfway into flowering they drank it up. Feeding them daily. Its not time wise to feed. Rather when plants need to be fed it would count as nute or tap water. So one nute feeding every 10 days seems really low.
Just re-read your post. Yeah if they drink that little than yeah stick to them yourtime line is right i guess.