Brown spotting should I be concerned?

I think it's a calcium deficiency. Feeding through the leaves by spraying them with a nutrient solution would be the quickest way to fix the problem. You can add a wetting/spreading agent, which basically makes it easier for the plant to absorb.
In hydroponics it's a lot harder for the roots to absorb calcium if the solution in the reservoir has a PH higher than 5.8. and if it is a problem with your PH foliar feeding bypasses the root system and Delivers nutrients right to the plant.

Thanks man! Just bought a spray bottle with a nice mist setting and sprayed 3 times will full strength magical from technaflora. Now one more question my back guy is a little droopy I lowered the feeding a bit from 15 min every 3 hours to 4 hours. would it help to have that internal fan on at all? Is she not breathing enough? I feel that it might be to strong though in that close quarters envirement. uploadfromtaptalk1400195366074.jpg
 
Hi Toe'- ..looks like NE took the words outta my mouth with the foliar spraying, especially with a wetting agent! --(nice call mate, BTW-- :thumbs:)... what the wetting agent does is take the surface tension out of the soln. you're spraying, so it coats more evenly instead of just beading up; basically, the more surface area that gets covered, the more gets absorbed... Spray the bottoms of the leaves too, if you can; a couple cautions: avoid doing it and letting the stuff sit on the leaves with full intensity lights on the girls, it may cause burning,... also, make sure they're fully dry by lights out, to avoid potential mold issues,... do what you can to let them dry slowly, to give the stuff a chance to get in,.... only stuff still in liquid form is absorbed; if they dry fast (like 15 min. or less), rewet them again with plain water to redissolve the goodies, and get more in! :tiphat:
 
Hi Toe'- ..looks like NE took the words outta my mouth with the foliar spraying, especially with a wetting agent! --(nice call mate, BTW-- :thumbs:)... what the wetting agent does is take the surface tension out of the soln. you're spraying, so it coats more evenly instead of just beading up; basically, the more surface area that gets covered, the more gets absorbed... Spray the bottoms of the leaves too, if you can; a couple cautions: avoid doing it and letting the stuff sit on the leaves with full intensity lights on the girls, it may cause burning,... also, make sure they're fully dry by lights out, to avoid potential mold issues,... do what you can to let them dry slowly, to give the stuff a chance to get in,.... only stuff still in liquid form is absorbed; if they dry fast (like 15 min. or less), rewet them again with plain water to redissolve the goodies, and get more in! :tiphat:

Thanks for the advice! I am a little confused on what you mean by a wetting agent? But I've topped off the res past few days with magical and 5.5ph water as well as misted the one lady. Tomorrow I'm switching nutes to full strength veg which should subside the issue.
 
Switched nutes today but still seems to be spreading I'm gonna give her a couple days to take in the nutes but she's very droopy and spots have taken over the 2nd tier of leaves. Any additional advice would be helpful should things get worse. Here are some photos uploadfromtaptalk1400394988074.jpguploadfromtaptalk1400395000998.jpg
 
Alright so I am currently flushing my ladies, but this has gotten very bad, the deficiency has taken over the biggest one with only one tier of leaves left and now it's starting to affect the back plant idk what to do anymore I figured flushing would've helped but after a day it's just gotten worse. I used magical with a spray bottle, that didn't do anything. I'm thinking of tossing these nutrients out the window
 
Spotting is continuing to spread on the fan leaves. Anyone have any other suggestions? I just flushed and I have been using full dose magical idk what else to do its on all the plants now. :(
 
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