Me and My Girls need HELP!

Help Please!
My grow is in its 4th week and I have been chasing what started out as a couple rust spots on a couple leaves of one plant out of four. I now have a few leaves on other plants with a few rust spots. I could give you a lot of history on things I have done to try to correct the condition, but I figured I would identify some basics and pics to start with and let the experts ask the questions. Growing Hydroponic in a Eco Grower and using Flora Series Nutes. PH is now @ 5.7 and PPM @ 720 (.50), Solution temp @ 72F, Tent Temp at 79F & 55% RH (Day); 69F & 40% RH (Night). I welcome any comments and advise.

Looks like cal-mag deficiency.

A~~~

Looks like calcium/magnesium deficiency.

It looks like a cacium deficency, your pH is fine and your stats look fine.

What type of hydro setup, dwc?

Thanks for the reply back folks. Yea I had actually added some Cal-mag the day before yesterday and may have accidentally doubled the prescribed dosage, so yesterday I drained the rez and reserviced it with a lower nute strength and the correct dosage of cal-mag, so hopefully they will start to improve. I just started using RO water and I'm told I always add Cal-mag because it is RO water. Is that true? Also should I remove the dead or partial dead leaves?

Start with the roots they still nice and white

Terry385 said:

Start with the roots they still nice and white

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There are 4 plants growing and while changing solution yesterday I noticed the roots were white on all but one plant and its roots were a off white color, almost a beige color, but not tan or brown. I also noticed some small root particles in the new solution that I could not remove from the rez, but not a lot.

gand3r said:

It looks like a cacium deficency, your pH is fine and your stats look fine.

What type of hydro setup, dwc?

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It is a Eco Grower from HG and I'm told it is both a drip/DWC set up. The rez holds 13 gal cap.

i'd run a tea i use the tea complete just to be safe easy to brew and use best thing works ( i use ro water ) cheap http://www.ebay.com/itm/191226121309?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT
http://www.skunklabshc.com/shop.html

you can make a tea also https://www.rollitup.org/t/dwc-root-slime-cure-aka-how-to-breed-beneficial-microbes.361430/page-201#post-12177819