Phosphorus deficiency in Hydro?

[budculture]

Looking at the excellent sticky on plant problems and it seems my plants may be suffering from a phosphorus deficiency. I'm using BC nutes Boost/Bloom w/ AwsomeBlossoms as well. Is this due to PH lockout only? I just re-calibrated my PH pen and it was off about a half a point. I've been keeping the PH between 5 - 6 without going over, as best I can, but it looks like I was off because of the pen. Can I have nute lock out with this small a variance? Should I add something that has more phosphorus? I'm about 7 weeks into flowering. The buds look good and growth seems good too, but many of the leaves look bad. Any help or advice would be appreciated. Thanks in advance.

"It matters not who casts the votes. It only matters who counts them."
J.Stalin

 

[budculture]

Sorry about the lack of info in my question. I've since corrected my Ph pen and changed my nutes and that seems to be the trick. I hadn't checked the trichs since I thought it was too early, but they were almost all cloudy , so yellowing leaves are OK at this point. She'll only go a couple more weeks so it's time to flush anyhow.

Peace

 

[Racefan]

Yes a small difference on the meter makes a big difference with the grow.
pH is a logarithmic scale, that is, the integer part expresses the order of magnitude, e.g. pH 5 has an acidity ten times weaker than pH 4. The fractional part is also logarithmic; pH 4.3 is approximately two times weaker, and pH 4.5 three times

 

[budculture]

Thanks RF. That's good to know. It's always a little tricky when we try to take the place of mother nature: she makes it look soo easy....It can be a lot of vigilance!

peace

"We had fed the heart on fantasies. The heart's grown brutal from the fare."
Yeats