budtoker0987
Active Member
meaning it has to be around room temp to get an accurate reading?? cold water would not be accurate?
Cacium Deff? Came Back from Up North and Bam
- Thread starter budtoker0987
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bonjo78
Active Member
yes , u can have a fluctuation of 2 degrees , more than that may give u crazy readings
another problem with ph meters is that they need wash after every use with distilled water in order to give always acurate readigns and they need calibration as often as u can do ... every time is best
another problem with ph meters is that they need wash after every use with distilled water in order to give always acurate readigns and they need calibration as often as u can do ... every time is best
asaph
Well-Known Member
none of this is true. the calibration liquids usually have the temp divergence listed on their bags... maybe 0.1 difference for 15 degress c difference... that's not much
and you should never put your meter in distilled water, this "steal" the ions from the electrode, not even for a test, use another method to test RO water
asaph
Well-Known Member
7.0 is ten times more acidic than 6.0, not 6.9. but yeah i guess aquariums are the reason they put that table there in the first place...
NewGrowth
Well-Known Member
Salts get 'locked up' in mediums like coco, peat, ect. Salts hold an ionic charge that can cause them to be 'bonded' to an alternately charged medium. Water also normally holds an ionic charge due to dissolved minerals and salts without too much complex chemistry the water needs available charged 'ions' to pull these 'locked up' salts from a medium. I use coco as a hydroponic medium it has to be "charged" with cal-mag prior to use or nutrient uptake is poor. Peat actually acts in a similar manner but it has a lower ph. If you are really interested do research on cation exchange, ph, and ionic charge. Trying to keep it simple though, you have nutrient burn. The solution is to flush with mild cal-mag and depending on the medium, resume mild feeding watching your new growth for any signs of further burn. 
budtoker0987
Active Member
Ya i just flushed 2 og kush yesterday but i didnt add cal magSalts get 'locked up' in mediums like coco, peat, ect. Salts hold an ionic charge that can cause them to be 'bonded' to an alternately charged medium. Water also normally holds an ionic charge due to dissolved minerals and salts without too much complex chemistry the water needs available charged 'ions' to pull these 'locked up' salts from a medium. I use coco as a hydroponic medium it has to be "charged" with cal-mag prior to use or nutrient uptake is poor. Peat actually acts in a similar manner but it has a lower ph. If you are really interested do research on cation exchange, ph, and ionic charge. Trying to keep it simple though, you have nutrient burn. The solution is to flush with mild cal-mag and depending on the medium, resume mild feeding watching your new growth for any signs of further burn.
i didnt see this until i did it already. I'll be feeding tomorrow tho. The wonder womans are gonna get flushed tomorrow. Question? I'll use RO for flush cuz im still not sure what is in my water and dont have a ppm meter. I only have 12 one gallon jugs that are sitting out right now full and ill need to put 10 gal minimum a piece thru that ww's so is it going to be ok to full those gallons as I empty them and use them for flushing right after? (obviously add the cal mag and ph to 6.5) so basically they would be colder than the ones I have filled right now. Shouldn't be too big of a problem right?
oh ya and FFOF medium
NewGrowth
Well-Known Member
My experience with FFOF is that it has a very long nutrient release time. If the pot is big enough you can get away with only feeding once or twice. I would recommend getting a water quality report, you can get it free from your local water company. It will tell you exactly what is in your tap water. To use RO for flush just add a very small dose of nutrient. Also replacing microbes in a bioactive medium like FF is a good idea if you think ph is an issue. Earthworm casting tea works excellent for this purpose. You could also use the tea to flush. To make earthworm tea put some castings in a sock, add 1tsp molasses (unsulphered) to five gallons of water. Steep the castings in the water a bubble with an air-pump for 24 hrs.