Help needed in Spain

Hello all,
I have planted some chocalate chunk seeds that I purchased in AMS.th seeds to be exact,they are doing great and out of the pack of ten seeds that I germinated 6 sexy gals are left,I have question regarding enzmes and EC.
First what is the EC level,what is or what does ec mean
and second,what are the enzymes the seller recomends using weekly,sorry ,but this is my first attempt and I dont want to jinx myself but I love the results so far.The other monsters growing a long side the choc-chunk are th seeds Bubblegum,,one word,WOW.Pictures to follow soon.:rasta:

Thank you all,

Let it shine,let it shine,let it shine,,,