Porsche928s2
Member
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 the table once there ready for final positioning but atm exposed to the 600w hps.
Your advice and help would be greatly appreciated as always.
Hope the pic help ....
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 the table once there ready for final positioning but atm exposed to the 600w hps.
Your advice and help would be greatly appreciated as always.
Hope the pic help ....
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