Canna Cannazym break down salts?? No more overwatering?

having a problem with my first grow.
I am using airpots but if i try to water with run off i end up overwatering.
I am growing autos so started them in their final pots which are 10l, its been 4ish weeks and they are a decent size and look healthy but it seems the roots are not able to hadle a decent watering still.
I have just read that cannazym beaks down the salts from nuteient build up.
C9uld this be the answer for all those who prefer to feed more lightly? Do we not need to worry about run off by using this?
Anyone know if it actually works?
What are your thoughts?
Any replys and advice would be greatly appreciated folks...thanks
 
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