I know I'm late BUT! Been in coco since 2006 and have been completely successful the entire time. I use canna a&b with
botanicare 5kg blocks. Fresh coir (transplanting) starts with nutrient solution ph'ed at 6.3ish to offset the pre existing low ph 5.5 in the coir. Here is where you will think I'm an idiot lol. With your rez full of fresh water and circulating add 350ppms of
botanicare cal/mag @6.8 conversion (don't know what ec that is). Then add equal parts of canna a&b until you reach 1ec....ph in fresh coir at 6.3ish and feed till you get significant runoff. The initial high 6.3ish ph will raise the otherwise low pre existing ph in the fresh coir to the target ph you want and need for your plants to thrive. All feedings afterwards are at 6.0 ph for the entire run. Why? Coco loves anything between 5.8 and 6.2 with 6.0 being ideal as a buffer setting allowing a potential swing -+ of .2either direction. Your plants NEED cal/mag supplementation as I directed, do not deviate. Always make sure your meter is calibrated for proper ph and otherwise. An old probe can give you a BAD ph read and your plants will get sick. ph is usually the culprit with sick looking plants, not toxicity, or deficiency. Remember, just because a plant can take a 1000+ ppms does not mean you're suppose too feed it that much. I doubledamn guarantee you if you follow this recipe you will be successful. Your humidity needs to be lower, 50-55% for your scrubbers to work optimaly and more importantly for proper plant transpiration. Your welcome and happy growing.
