any help would help

[p man]

anyone know why my leaves are like this... brown spots ..started apx week 3 that's when I figured maybe they need some food
autoflower apx 50 days old
lightsutdoor and indoor cfls t-5 and 1- 400 watt hps
grown in 3 gal air pots using happy frog
started using ro water around week 4... ph apx 6.5..tds apx 1050
fed them botanicare grow 1/2 strength with some calmag 1tsp per gal.
now feeding them botanicare soil bloom 1/2 strength with some calmag

 

[JJ Bones]

First two pictures look like rust to me, I'd go with SNS-244 for that.

Third picture is a deficiency, when is the last time you flushed?

 

[p man]

thanks...what causes rust to develope...I only flushed once .....this started apx week 3 ..this is my 1st grow and it's with autoflowers and I think I only have a week or two left they're looking pretty good except fot the spots...we have chloramines in our water and my filter takes out chlorine but not chloramines so I need to buy another filter ..do you think that (the chloramines) has any effect on the plant I've read the chlorine evaporates leaving behind the ammonia part...so anyway I won a 'pro' starter kit from botanica and last night I dosed them up with some of the stuff I won ....silica, hydroplex, liquid karma, some sweet raw, and my soil bloom..I figured what the heck only have a little time left anyway ...here's a picture from a couple days ago I'll post some fresh ones soon!

 

[JJ Bones]

If you're only two weeks away from harvest then I would start flushing and keep flushing until you're finished.