hey there, well low iron, that would at least in part explain the tiredness, yes? hmm, i would check out the forum links below and then weigh your options.
personally, i think iron would at very least make a big change to
your level of fatigue, not to mention working with the b-vitamins to
build myelin, and with your immune system to FIGHT infection (i make these comments based on the links at the end of this post)
i believe, if you are low in iron, your body's starved metabolic processes
will be snapping it up like sponges for a long time before you
have to worry about excesses boosting bacterial or viral overgrowth!
for a supplement, i think you'd be fine with your old standby, ferrous sulfate. you could consider finding something blended with a couple of the other types, perhaps (ferrous fumarate, ferrous glucomate). i'd personally be more worried about chelating if i was taking a maintenance iron supplement, not if i'm boosting myself from deficiency to somewhere in the normal range.
i don't recall exactly but i think to kick me out of my original iron
basement (one of my recent numbers was 41; normal range 41-300)
i had to take something like 300mg per day for a while, plain
old ferrous sulfate, little red pills.
consider taking C, A, and B-complex at the same time as your iron supplement.
http://www.thisisms.com/ftopicp-19748.html#19748
http://www.thisisms.com/ftopicp-15423.html#15423
so why do you think your iron is low? any of the usual suspects apply in your case? sorry, but what's ice cruncher?
i hope i answered your question all right, if you want me to dig any further just say

good luck recovering from the fatigue, it's such a drag.
(i think i have the same problem right now - my current iron supplement is a DISGUSTING liquid, so i haven't taken it in ages, and i haven't been to the shops to replace it in months!)