Leaf discolouration

[Frank_Spencer]

-Problem: Started to get some discolouration on the top leaves.
-Medium/grow method: Biobizz light mix
-Feed and supplements used: AN Sensi Bloom A&B 5ml each per 1,5ml fed twice a week (So thats 1.5 litre of feed every three days), Plant Magic CalMag 1.5ml in with Sensi main feed. plain ph'd water in between feedings.
-Water source: Tap water left to sit for 24hrs. When used for feed it's not ph'd. When used for just watering I ph to 6.3-6.5
-Strain and age - SeedStockers OG Kush - 53 days
-Climate: RH between 53-60 Temp 22-25
- Light used: Viparspectra P1000 24/0 Light 13" from closest to 16" from lowest.
-Additional info:Last 24 hours - Pretty quick onset - Lowered light from 14" closest yesterday

--Pictures including WHOLE PLANT PICS, and troubled leaves.. use normal light or flash as other light sources ruin color rendering, critical for diagnostics!

 

[armanidog]

I'm going to bump this up since no response.

 

[namvet25]

-Problem: Started to get some discolouration on the top leaves.
-Medium/grow method: Biobizz light mix
-Feed and supplements used: AN Sensi Bloom A&B 5ml each per 1,5ml fed twice a week (So thats 1.5 litre of feed every three days), Plant Magic CalMag 1.5ml in with Sensi main feed. plain ph'd water in between feedings.
-Water source: Tap water left to sit for 24hrs. When used for feed it's not ph'd. When used for just watering I ph to 6.3-6.5
-Strain and age - SeedStockers OG Kush - 53 days
-Climate: RH between 53-60 Temp 22-25
- Light used: Viparspectra P1000 24/0 Light 13" from closest to 16" from lowest.
-Additional info:Last 24 hours - Pretty quick onset - Lowered light from 14" closest yesterday

--Pictures including WHOLE PLANT PICS, and troubled leaves.. use normal light or flash as other light sources ruin color rendering, critical for diagnostics!

Be careful of light burn.

 

[Frank_Spencer]

Brilliant. Will do. Cheers

 

[Mañ'O'Green]

Looks like you might be starting a Mg problem from probably too much Ca. Bio-Bizz has Dolomite lime from the vendor and it should be enough that you do not need to add any extra Ca during the grow other than what is in your base nutrients. Don't forget your tap water is also a source of calcium and you need to know how much. You should be able to access an online water quality report.

 

[Frank_Spencer]

From the water company report the Calcium mg Ca/l is 17.44. I will hold off on the cal mag. Thanks for the info. Much appreciated.

 

[Mañ'O'Green]

From the water company report the Calcium mg Ca/l is 17.44. I will hold off on the cal mag. Thanks for the info. Much appreciated.

That is really soft water! You are lucky. There should be plenty in the AN.