upgrading to 4wpg, how often for trace nutrient fertilzation?
" wrote in message
m...
Your issue is two fold, you have less NO3 but your real issues is a
lack of CO2.
Does anyone else out there regret skipping biology in favour of physics? :-)
I'm happily employed in IT at the moment, but I wish I'd spent more time
learning chemistry and biology.
At least we can learn and catch up online.
Graham
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