Heya Wayno =) , Canna is different to my coco nutes (H&G) , but I always find the additives usually raise or lower the PH directly after you add them , so testing straight after you mix them can give a false reading. Do a test, mix a fresh batch in 2L bottle, measure PH straight away........ then mix a batch and let it sit for 3-4 hours , then test it.
I'm not sure if it works with Canna, but with H&G, I mix A with water, shake/stir then leave for 15 minutes, add B shake/stir and then after 10-15 minutes I get a base Nute PH, then I add my additives after and do not retest, just water.
The main part to let sit is between adding B to part A in the mixing resi/container, you need to allow part A a little time to mix with the water before adding B.
Hope that helps. Peace. Nibbler.
And so, life returned to normal, or at least as normal as it gets in this primitive dirtball inhabited by psychotic apes. Thanks to the effects of the Hash waves, the people of Earth have not memory of what had transpired, except Nibbler, and no one believed him or cared what he had to say. I, meanwhile, returned to my post, ever vigilant, lest Earth again come under Hash attack. And when that day comes, God help us. God help us all.
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