Hey Grohi, thanks for the tip. Ive been using the solution to make up for the meter's crappiness but I didn't really consider that it will probably be the most accurrate too, Great Idea I'm gunna keep using it I think.

By the way, I have a tip for anyone who is still looking at this thread. If you want a much better ph balance in your res. pick up some Fulvic acid. I already had some but never really thought to use it in hydro. Normally my ph swings around 1-3 points from 1 day to the next depending on the stage of growth but now its only going up by a litle less than 1 point per day in a 6 gallon res. not too shabby!

http://www.hydrofarm.com/pb_master.php?brand=78

Nutra-Dip continuous TDS meter and or the tri meter..Both work pretty good if you ask me...Check ebay for some deals...

Ive used the pinpoint ph meter for awhile now. Rock solid! Its nice because if you get a hair up your ass you can order a $200 ph probe that will plug right into the pinpoint meter. Titanium tips that dont need cleaning, or a refillable probe so you dont ever have to buy a new one... ect.....

nutradip trimeter seems to be workin awesome, easy to calibrate and use. uses probes to constantly monitor ph, ppm, and water temp... cost about 270 USD, well worth it cause who wants to dip pens all day!

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Ive purchased one off of Ebay.... similar looking to the Nutradip in the post above... Same color and all but directly from Gains Express <----- Ebay Store Name (Ships From China). I was regretting it at first when it arrived as it looked kinda cheaply made. Still cost me about 125 with shipping but much to my surprise, it has held a proper calibration for 6 months now even after being constantly immersed in nute solution. I checked the calibration weekly at first just because I was skeptical of the brand but it has worked and lasted longer than the initial $75 Milwaukee PH Pen I started off with that screwed up my first grow and well it monitors temp, PH, EC and PPM Conversions. Has a built in battery with a USB / AC Charge Adapter. Pic is attached.

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Nice find man, just to let you know... 77 degree reservoir temps are wayyy to high, you should never let it get above 70°F

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Appreciate the input.... Had just done a cleaning of the temp sensor prior to taking that pic so it hadnt stabilized the reading. Res Temps usually hang around 69 degrees... A convenient number.... but it works... I keep the reservoir outside of the Grow Lab Tent and my house temp is usually at 70..... with the highs inside of the tent at about 81....

Oh alright I gotcha man, I just wanted to point that out so that nothing got fucked up
But if it is at 69°F than you should be good to go

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Yea I at one point had black DWC buckets in the tent and sure enough... 4 weeks into Flower, I got root rot on 3 out of 6..... A sad site to see but I learned from it and continue to learn as I go...

"Providing SIX different measurements, you will have all the information you need about your hydroponics system. This unit measures pH, EC, PPM, CDF, Celsius temperature and Farenheit temperature."

You gotta' give it up for marketing...