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Paph problems
This is pure speculation, but as you're condensing water vapor from ambient
air, aren't you possibly getting some of the other airborne species along with it? -- Ray Barkalow First Rays Orchids http://www.firstrays.com Secure Online Ordering & Lots of Free Info! "Jerry Hoffmeister" wrote in message news:N7HZ9.76600$6G4.11952@sccrnsc02... I have an RO water / pH question - I'm watering w/ "distilled" water from the dehumidifier that keeps the rest of the house safe from the humidity that leaks out from my loosely enclosed table. I've noticed some root tip burn and some chlorosis (I'm sure that's spelled wrong - lack of green in new leaves) which I know can be caused by a multitude of issues from too much light to not enough iron but I thot it might be pH related so I went out and bought an aquariam pH test kit. The water before fert reads just about neutral (7). after adding fert, pro-tekit, superthrive it's a bit basic, maybe 7.2 or 7.3 which I don't think should be an issue... but could something else be going on in the pot? How / should / could I check it? The other interesting thing is that the dissolved salts in the "distilled" water reads more than the water straight out of the tap - 40 ppm vs 33 ppm here in Seattle. "Ray @ First Rays Orchids" wrote in message ... In addition to the great suggestions already mentioned, I'd suggest modifying the feeding/watering regimen a bit: using straight RO water can lead to really extreme pH levels, which can affect the availability of nutrients to the plants. Personally, I feed a weak solution of known TDS and pH at every watering. -- Ray Barkalow First Rays Orchids http://www.firstrays.com Secure Online Ordering & Lots of Free Info! "Jbkkhawk" wrote in message ... Hello all, again. My Paphs--sukhakulii, gratrixianum, Magic Lantern, and a few others just don't seem to be doing well. The leaves, especially the older ones, are pale, yellowish and waxy, and they don't seem to be growing at all. My growing conditions: in my bedroom, days 65-70F, nights 52-55F, about 30-40% relative humidity, some ambient light and about 12-15inches under 4ft. flourescent lights. I try to keep them moist and feed with weak paph fertilizer supplemented with calcium and magnesium. I use RO water the rest of the time. Is it just too cold for them or what? Too much light? I do have a mini phal that is in spike, but has sort of reddish tinge to the outer edges of the leaves and is not a strong looking plant...Thanks for any feedback. Other genera are doing okay. Cattleya skinneri is in full bloom! Karl |
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