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    Utricularia macrorhiza

    This is a common aquatic carnivorous plant around here. I tried to grow it, but I haven't had a long-term success, though. It is supposed to be similar to U. vulgaris, but the shape of the spur is...
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    Thank you for the link, NaN. Initially, some of...

    Thank you for the link, NaN. Initially, some of us thought that it could be a predatory/rival-removing purchase, but now I can see that they are a way better parent than verizon, and Smugmug seems...
  3. Thread: DIY COB LED info

    by naoki
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    I think you have one HLG, controlling 4x CXB3590,...

    I think you have one HLG, controlling 4x CXB3590, right? Then you want to use 100k ohm pot as the dimmer. I think the other values of pots are when you are controlling multiple drivers with a single...
  4. Thread: DIY COB LED info

    by naoki
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    nimbulan is right. It's not a problem at all. I...

    nimbulan is right. It's not a problem at all. I have exactly same driver/COB combo, and it works if you make parallel loop.



    driver+ ---- COB1 ----- COB3 --- driver -
    \- COB2 -/...
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    Yes, epoxy type sealant is much more expensive,...

    Yes, epoxy type sealant is much more expensive, so I was also trying cheaper elastomeric (looks like FlexSeal is elastomeric paint, but I used a different one). I've seen people used it for plywood...
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    Nice, is it constructed with wood with sliding...

    Nice, is it constructed with wood with sliding glass doors? What did you paint the inside with (to deal with moisture)? I've tried elastomeric paint (those used for roof painting), but now I'm...
  7. Thread: DIY COB LED info

    by naoki
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    Good to know. Was it still usable? Which LEDs...

    Good to know. Was it still usable?

    Which LEDs did you use? I haven't done a comparison, but I believe Bridgelux came out with Gen2 of EB series strips late last year.

    As a related note, at...
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    Vero 29 super deal

    This small-scale grow light maker is closing-out. Everything is 50% off.
    They have Vero 29 Gen 7, pre-drilled pin-fin heatsinks, Meanwell drivers. All good stuff for amazingly low price. They...
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    Postimage has a similarly simple interface....

    Postimage has a similarly simple interface.
    https://postimages.org

    But with several of these services, you don't have a control over licensing. I didn't find any info about imgbb.com, but here...
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    Thank you, DJ!

    Thank you, DJ!
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    Thank you very much, DJ! I've been wondering how...

    Thank you very much, DJ! I've been wondering how much seaweed extracts people are applying with MaxSea. I don't have it because I prefer a complete fertilizer (with Ca and Mg). But based on your...
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    Has anyone measured EC of this fertilizer with EC...

    Has anyone measured EC of this fertilizer with EC or TDS meter?
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    Good info, Loki. You switched red vs blue, I...

    Good info, Loki. You switched red vs blue, I think. In the relative spectral power distribution (SPD), shorter wavelength (left) is blue. So cooler color (high K) has more blue and less red. ...
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    That's a good size! You can make 2 shelves or 3...

    That's a good size! You can make 2 shelves or 3 shelves. I don't know if they have made any progress, but I personally would avoid Mars LEDs (but I'm sure it works ok if your electricity isn't too...
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    Good to know (although I still have quite a bit...

    Good to know (although I still have quite a bit of H stocked up)! Q is about 10% more efficient, so H-series with lower price could be a better deal (especially with the coupon, it could be the...
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    When I was using T5HO, the ventilation was a big...

    When I was using T5HO, the ventilation was a big issue (to prevent overheating). So I had a thermostat, which turns on and off the venting fan. The venting defeats the main purpose of the tent to...
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    ppm is weight based, and not the number of...

    ppm is weight based, and not the number of molecules. So you put 100mg of fertilizer in 1l of water, it is approximately 100ppm TDS. Strictly, you should use (1 Kg - 100mg) of water.
    Then with...
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    Oh, so you measured the weight of 1/4 tsp of...

    Oh, so you measured the weight of 1/4 tsp of fertilizer to get 97.7ppm?

    Yes, you probably don't have to worry about the 3 missing essential elements in MiracleGro: Ca, Mg, and S. If you do, you...
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    I'm guessing 97.7ppm is approximate TDS (from a...

    I'm guessing 97.7ppm is approximate TDS (from a TDS meter), which is different from nitrogen concentration. TDS is an important factor, too, but I was talking in terms of N conc. (most...
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    Some people talk about fertilizer "strength", but...

    Some people talk about fertilizer "strength", but I'm not sure how much you are giving. Most of the time we talk the dilution of fertilizer in terms of nitrogen concentration. So in your case it is...
  21. Thread: Pupoh's orchids

    by naoki
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    Wow, Platanthera ciliaris is amazing. How do you...

    Wow, Platanthera ciliaris is amazing. How do you grow it? Is it from Great Lakes Orchids by any chance?
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    Yes, this species seems to be so floriferous! ...

    Yes, this species seems to be so floriferous!



    The lower lip (petal) is about 8mm. But Taylor's book said that it is supposed to be 1-1.5cm. So mine is at the small end for this species. The...
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    Utricularia blanchetii

    Utricularia blanchetii is a Brazillian terrestrial Utricularia with a limited genographic distribution (central Bahia). It seems to be ok with fairly low light (phototynthetic photon flux density,...
  24. Thread: Back in Alaska!

    by naoki
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    Glad to see another alaskan, here!

    Glad to see another alaskan, here!
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    Thanks, BB. If you don't mind, could you...

    Thanks, BB. If you don't mind, could you possibly post the citation (volume, page numbers, journal etc)? I'm interested in the topic.
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