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OK I'll try to make this simple... If you're water measures in at 100 ppm and I'm going for a 800 ppm nute mix for my plants.. Should you add that to get 900 for the total ppm of the solution, or should whats already in the water just be added as part of the total ppm goal giving you 800?

http://secure.sciencecompany.com/HM-Digital-Economy-TDS-Meter-TDS-EZ-P16349C679.aspx just bought this one here.. its 15 bucks just need a ph meter now.. I'll let you guys know how this thing works when it gets here in 5-7 bus days

Hey I had a link but lost it.. Somewhere around here you can get a ppm meter for around 15 bucks.. I'm looking for anything cheap really.. just has to work.. If you guys know where I can find one cheap or can post where you got yours for the low I'd appreciate it.. thx

I agree with sinn. It is one of the easiest. but personally i went with DWC my first grow. I found it easier for me to hook up a DWC with what i had laying around. All you really need is some buckets and an air pump, At least i started with that. i got decent results as well. you can always...

cool idea. i think many could benifit off of seeing a usefull microgrow in action. ill be following

I see everyone using RO water on here. What system or purifier do you guys use? Like everyone else I'm looking for the most effective for the least amount of money. I will need it to be able to do 20-35 gallons every other week or so with the res change.

So the title says it all. I'm curious if you guys have done both under the same settings and which did better. if you can send links to threads as well that be great.

thx guys. just what i was looking for

Just curious whats the optimal temp for the water in the res. and the effective temp range for the res? (low end-High end)

sounds interesting i'll bump as i'm curious on this. Sounds to good to be true though. if it really did work it seems we would all know of it by now

Hey guys need alittle advice here. I'm ordering seeds from nirvana. Blue Mystic and Chrystal. I'm picking these for there bag appeal there ability to produce weight in a short amount of time. These strains are close but non the less are different. I'm building an aeroponic system right now...