New RO system raising ph

[Rusty Trichome]

Stinky...Wow...cool. Didn't know that, lol. Could this be why others complain about the Hannah meters, or do the just suck, period?

Rusty Trichome Reviewed by Rusty Trichome on 06-08-2008. New RO system raising ph Just picked up a 100 gpd ro system. Ran it for about 40 minutes first to clean it out like the instructions said, then filled up a 5 gallon bucket. Ph'd the water after and the filter raised it from the 7.3-7.5 range to 10. Is this normal? Do I just need to let it run awhile to clean it out? Rating: 5

[stinkyattic]

Rusty that is EXACTLY the problem with them! They can't read low ionic strength solutions. And even in the range of ferts, they still seem to have problems holding a correct calibration.

[Rusty Trichome]

Cool. Another nugget for my knowledge bag.
Too bad there isn't a list of unusable equipment and less-than-desireable nutes and soils for cannabis growers. Little nuggets like that can save newcomers big bucks, and avoid those nasty lock-out headaches and nanner assisted anxiety attacks.

Regardless, this will definatelly help with future troubleshooting.

Any other bitchen secrets you've been keeping, lol?

[stinkyattic]

Any other bitchen secrets you've been keeping, lol?

I know under which Hawthorne tree King Arthur sleeps.
I knew who Deep Throat was before his deathbed coming-out.
And I can divide by zero. :jointsmile:

I know a couple things, but I'm a stoner, and, as I was recently and courteously reminded, stoners have crappy memories and need to take their Flintstones chewables. Which have not passed my lips since the 5th grade. So you will have to prompt me.

[gbf4ever]

Thanks for the help stinky and rusty! My meter is one of the fairly cheap Milwaukees. Just ordered one of the bluelab combo meters since I don't yet have a way to check tds either. I've heard pretty good things about the bluelab products.

[stinkyattic]

Bluelab makes nice gear. Your Milwaukee is actually a good unit; just keep it calibrated and check against your buffers regularly.

[gbf4ever]

My plants in flowering were ready for a feeding so mixed up some nutes using the RO water. pH meter was dead on after adding nutes compared to the liquid test, so that was definitly the problem. I have one of the ph600 Milkwaukees. Great little unit for a pretty decent price. I clean the probe after every use and store it wet with some storage solution. Calibrate it about once a week and its never been more the .1-.2 off.