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Hi Guys..... I'm Running NFT table with 3" rockwool cubes.
PPM 400 using canna A & B veg nuts.
Water temp 18 - 20c and ph hovers around 6.0. Girls look fine apart from a little nute burn during there early phase.
Over the past couple of days I've noticed a white crystal type residue appear on the top of the cubes.
Would i be correct in thinking this is a salt build up? If not would you guys know what it is and what is causing this issues and how do prevent it from spreading.
I will cover...
Help please guys !...pictures attached some sort of build up.
PPM 400 using canna A & B veg nuts.
Water temp 18 - 20c and ph hovers around 6.0. Girls look fine apart from a little nute burn during there early phase.
Over the past couple of days I've noticed a white crystal type residue appear on the top of the cubes.
Would i be correct in thinking this is a salt build up? If not would you guys know what it is and what is causing this issues and how do prevent it from spreading.
I will cover...
Help please guys !...pictures attached some sort of build up.
from Hydroponics / Aeroponics
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