I used basically a quarter of the recommended dose for part a and b. You will burn shit out of your plants if you use the recommended dose of 4ml per litre...mind you I let my coco dry out so it concentrates the salts. If you water twice a day everyday I guess you can have a stronger solution, but you are also wasting a ton of nutrients as well if you are doing drain to wasteNice to see that someone else who has used Connie say the same things! I too bought the a&b, mixed it at 800 ppm and went on vacation for 2 days. Came back and fuck! It transformed my garden! I'm now using some additives but I'm not really sure I like them as much, bid candy, big bud, b52, overdrive, rhino skin. Since I'm using them all together I'm not sure which one is burning the plants but I've since cut back a bit on the additives