Digital ph meter for 20 bucks.

Digital pH Swimming Pool Meter Tester Water Garden p3 - (eBay item 320154508757 end time Sep-06-07 05:24:07 PDT)

ec meter for 25 bucks plus postage.
EC CF PPM Dipstick Meter Hydroponics Nutra-wand - (eBay item 230165548112 end time Sep-05-07 08:24:19 PDT)

Those little fluid ph tests kits will piss you off beyond all known belief.


The thing is with meters for hydroponics is that yes you could quite possibly grow and get away without needing a ec or ph meter but if anything does go wrong your going to flip your lid. The best thing about hydroponics is the level of control you have over your plants environment, if you use the meters you know exactly whats going on because you know precisely what you fed it.