Hi, Email me and I can tell you where to contact her. Remy

It looks like you've found your answer Fruitnut. Since there has been some confusion about what pH is, I wanted to add a few comments about it. I don't remember that much about it myself, but have had discussions with my daughter, and she's pretty brainy on the topic. It's interesting to me how it works, and this is how I understand it. pH measures the amount of positively charged H ions/cations. The small "p" stands for the latin term pondus (weight) and the "H" stands for the term Hydrogen (That's why the "p" is always lower case, and the "H" is upper case.) The reason the pH scale is logarithmic is that a solution with a neutral pH of 7 will have 10 to the minus 7 moles of Hydrogen ions per liter. A solution with pH of 6 will have 10 to the minus 6 moles of Hydrogen ions per liter (10 to the minus 6 being 10 times more than 10 to the minus 7). So as the pH reduces there is a greater and greater concentration of hydrogen ions till you finally get to a theoretical pH of 0, which would be 10 to the zero power, or one. In other words the solution would be more or less 100% hydrogen ions. Interestingly, there is also a pOH scale which also measures alkaline/acidity and is the inverse of the pH scale. OH is a negatively charged ion/anion. A pOH of 8 would be the equivalent of a pH of 6. But what's interesting to me is how it comes together. Everyone knows water is H2O. In theoretical terms pure water has a pH of 7 and a pOH of 7. That means there are exactly as many free roaming H+ ions as there are OH- ions (10 to the minus 7 of each), which when come together form H2O. Sometimes pH probes can be in error because they only measure cations. Hydrogen is not the only cation. Sodium also has a plus one charge and Calcium has a plus 2 charge. The cheaper probes we are talking about will pick up Sodium and Calcium cations in their measurement. You can try it yourself to see if it affects your probe. Take a glass of water from the sink and measure the pH. Then add some table salt to the water and check again. Chances are the probe will indicate a reduction in pH, even though it hasn't really occurred. The probe is picking up the Sodium ions. I've tried it, and while the error isn't huge, there is some error.

Celeste, DML is not new to me. I've had her about four years and I was very surprised that she is blooming so late. This is an ffo for sure!! Yes they are Val and very rare for me. I have several scapes coming on different ones that will be re-bloom with and exception ( 2 ) of some new ones from Maryotts... Crackingtheconcrete, she is not a new one but yes, it's a bummer not to see the new ones bloom... She is a cutie Rita. Even prettier when she has multiple blooms. Well Jean, we all have different tastes but for myself, I like all shapes and really like the spiders and uf's. She doesn't have as much color as usual though. Thank you all for your comments!! Ellie

First you are confusing correlation with cause and effect. It is a common problem. If your observations are reproducible, you might start looking for environmental causes. There are way too many uncontrolled variables in your situation to fly off the handle and start buying CO detectors and other equipment, or blaming the HVAC system. That considered, A partial vacuum in the sleeping room (induced by the HVAC system for more than one reason) can cause air to be sucked in through leaks from other areas, rooms or outside. You can draw in allergens, fumes and whatnot from the attic, outside or a crawlspace. I agree with sleeping with the door open as a test. In addition, with the fan on, and the door cracked open just a little, which way does the air blow, in or out of the room? Is the door undercut significantly? Where are your supplies and returns? These are all things that will indicate and influence pressure differentials.