hi i just got this ec meter today the guy in the store said it easy to use just multiply by 100 and that would be my reading..so i tested it out and found out that the water ive been feeding to the plants was 5 so that would be 500..i think..i think thats high not sure, my next water'n will be tomowrow..i hope i have not missed them up..what can i do to fix things shud i add water to bring it down ..let me know