How am I doing? Plants look sad :(

My plants are starting to look a little sad, any ideas??

My EC is around .850, ph is 5.8-6.2 and they are now getting watered every 6hrs for 15mins. <EDIT> I've backed it off to only 10mins just in case they're getting over-watered.

Thanks

the third and forth pix look god awful, but the first two don't look nearly as bad. the first two could be some simply overwatering, but not sure about the other two, they don't look like they are going to make it much further in life.. sorry, but i'm a dirtbag, and i'm not so good at reading hydro plants, but i felt bad seeing zero responses in your thread.. many someone else will chime in and have a better answer for you..

i likewise, have no idea....i growl soil...barely...
:looking:

i would have said to much nutes, lights to close, and water res is to warm/not oxygenated enough, though.....

Nutes are Technaflora Boost and Grow, Thrive Alive Red, Superthrive and a little bit of Rhizatonic. Their "Recipee for Success" also calls for some Suggar Daddy and Magical, but I didn't have them at the time I mixed my first batch. I have them now and am doing a rez change tomorrow hopefully so I'll make sure to add them to the mix.

My light is 400mh Digilux on a Lumatek ballast, dimmed to 300w in a Radiant hood. I've raised the light to about 17" from 13". I also just switched to this from my 220wHO floro.

I had to add more hydroton because I didn't realize just how much this table holds(40gal/150litres), so I had to pick them up and build them up into the mounds they are in now. I was careful with the roots and didn't think I ripped any. I did this and switched from the floro to mh lights at the same time. Too many things changed at once?

Oh yeah, rez temps are 64-66. I just flushed them with some 5.8ph with SM-90 today too

Thanks again any ideas

I don't think it has anything to do with the light being too close. If they were mine I would flush the system and just run RO water and about 1/4 of the recommended base nutrient for a week or so. I think they will perk up and make it.

Well they've been stress free for a week now, and looking better. Although a few of them are now showing slight signs of leaf tip curl(eagles claw). My pH seems to drift up to 6.2 over night after correcting to 5.5 before I got to sleep, so not sure if that caused the tip curl.