Possible calcium magnesium problem? Leaf tips curling

[Rossta420]

Hey,

Alright so I currently have some MaxiGOM on the go and I am starting to see some curling of the leaf tips. I am growing in an ebb and flow system using Hydroton as my medium. I am running the sensi grow/bloom PH pefect line for nutes. I havent given any other supliments. The plants are now in the 5th week and I am feeding 4ml per liter I have attached some pics any advise would be appreciated. Also does anyone have any experience using the the AN sensi cal
mg mix. I see that they have a line for grow and one for bloom, would this be a wise thing to be adding with my base nute for the entire grow.

Day time temp: 80
Night time temp: 70
PH: 5.5 - 5.7
RH: 55%
Feed rate: I flood for 30 min 4 times daily
Light schedule: 18/6







This is my first run with the hydroton and don't know if I should be using the sensi cal Mg at all times? Thanks again for reading this and sorry for being so
long winded LOL

Cheers,
Rossta

 

[Rossta420]

BUMP

 

[realcarlos]

Patience my friend someone with the knowledge will get back to you

 

[Rossta420]

LOL CHEERS MAN. Sorry to be so bumpy my bad. Somedays it's hard for a young jedi.

 

[roadsidevendor1]

man that sure looks like the clawing that
happened when my res temps got too high...
that was DWC though,,yours may be different

 

[Rossta420]

Thanks for poppin in roadside

so the thing is it's only happening to certain plants and in theory they all get the same water being in a flood table. What would the ideal temp be for my res? My temp is at 77 give or take.

 

[roadsidevendor1]

I made every mistake possible with DWC,
it was a real struggle that killed many great
seeds,
I even froze bottles of water to cool the res,
but I couldn't get it down enough.

 

[The Medicine Man]

That looks like over nitrification to me.

 

[Muddy]

Looks over fed to me too, but res temps are too high. I believe 65-68 is optimum.

 

[Rossta420]

Thanks medicine and muddy

So what would be the fix for this do I flush with ph'd water? or do I just cut the feed schedule down to 3 times a day? I have lowered my temp in the res and it is now at the proper temp. What about the sensi cal mg? would it be benificial to use this?