how do people avoid magnesium defs

[stonehead]

Reason I ask is I'm getting what appears to be a mg def on each grow so iv started adding Epsom salts to my 5L water whilst it bubbles for 24hrs but doesn't seem to have any effect, I'm still getting the chrispy old leaves and some mid leaves at week 4ish.
iv since planted 4 other strains and they are coming out pale with the darker veins and from looking around seems mg related aswell.
will get a pic up.

Thanks

 

[keep pounding]

molasses or Epsom or cal mag
first three I can think of
with this ? a pic is really needed

 

[stonehead]

what started at 4 weeks


what I have on the new 4

 

[keep pounding]

nice pic. first thought by looks is n is getting low and cal also. maybe ph is effecting n cal mag.
maybe someone with a better eye can help
iron can cause a leaf yellow too

 

[namvet25]

I need some info please. Soil,nutes with npk numbers,feeding scheduale,PH readings.

 

[stonehead]

thanks, these are on tangs eazy schedule in plagron light and ph perfect nutes, have added mg at every watering with food and without even with the first pic, was fed mg in the water but didn't have the look I have with the other 4 early on just after 4 weeks, other 2 pics are a bb blue cheese at 20 days, also my plants at 10days have this look aswell, plant in first pic is in biobizz light

 

[namvet25]

Ten day old plants should not have any defiecencies I would stop giving any nutes for awhile but they may need calcium more than they need magniesium.I'm really not a fan with Epsom salts and would recommend not using it and use a cal/mag mix instead. Those damaged leaves will not recover so I would get rid of them.Only thing I can figure out is when a plant at 10 days has problems it's from too many nutes or something in the soil that's causing the problem.

 

[stonehead]

the first picture the plant is 30 days, second and third are 20 days.
I gave 1ml per litre calmag+ with a feeding and gave me a bit of tip burn so I didn't use it.

the 10 day old plants havnt had any nutes yet

10 and 20 day plants look like pic 2+3 other 34 day old plants are 1st picture and didn't start like 2+3

 

[stonehead]

they all started looking like this from popping really thinking back so must be the plagron light mix but what to ad and how much is what I don't really want to test with out a trained eye looking over it. they are growing so well but just really light.

the 1st pic is how my last 4 plants also went in biobizz. again. they didn't look like pic 2+3 when they started :/

they are just over 2 ft from a 600w cooled hood at around 26* if it helps

thanks