you might have to flush some of the fert out(that itself may raise it)or after you check it,and it's still a little low,wait for the medium to drain,and water with the lime checking the ph every day till you get you're target range,it will take a few days to do this,but it's the safe way,better yet,follow the directions for a quick fix....bonbon
bonbon Reviewed by bonbon on . ph level too high hi, i am 4 weeks into flowering and ny ph level is reading 4.5 too acidic,whats the most effective way to raise this level? i am growing in a mixture of soil and perlite using miricle grow 15 30 15 every 4th watering, next time i will have built up nutrients to 3/4 strength. I have some bicarbonate of soda but i understand this is not the most efficient : Rating: 5