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OfflineVALIS
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leca - "floaters" vs. "sinkers" ??
    #4061132 - 04/16/05 01:34 AM (11 years, 7 months ago)

Trying to figure out why some leca float and others sink:





... on the left are the "floaters"; right, "sinkers".


I thought at first that the ones sinking had more moisture/water content; and that the floaters were dried out. But then after testing this out by keeping abunch of them submerged for days, and they still floated, I figured it was simply because the floaters were less-dense/more-porous.

Which leads me to my next question - which of the two are theoretically "better"? I mean, better at wicking moisture into the chamber and raising rh; that being their primary purpose. Denser sinkers, or ligher floaters?

I realize this is almost silly, and I wouldn't be surprised if I'm the only person in the world who has ever even considered caring over the difference.

Anyhow, I was purposefully separating out the floaters and using the sinkers because I initialy thought they held more moisture and simply because I personaly thought they were easier to work with; but now I'm wondering whether I should be using the floaters - if it's true that they're more porous, it seems they would be better wickers.

Also... here's another trivial pointless question bordering on the absurd - can anyone think of any real difference in functionality between small leca and larger leca?




I know this makes a difference in hydroponics, depending on the type of root of what your growing ( larger leca = more space ); but I wonder whether there is any inkling of a functional difference when using this stuff for our hobby in a pod?

Thanks!


--------------------
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OfflineIGnosticAbhorI
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Re: leca - "floaters" vs. "sinkers" ?? [Re: VALIS]
    #4061139 - 04/16/05 01:35 AM (11 years, 7 months ago)

Bigger = Rougher surface...Smaller = easier to spread out...

More porous = Better "wickage" lol

just put the floated under the "sinkers" :wink:

-Gnostic


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OfflinePowerTrip
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Re: leca - "floaters" vs. "sinkers" ?? [Re: VALIS]
    #4061216 - 04/16/05 01:57 AM (11 years, 7 months ago)

It seems to me that the sinkers would be better. The floaters must be floating because they have air trapped inside, which means that they are not letting water in. I noticed a few of mine floating, but after soaking them for a while they all began to sink.


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OfflineVALIS
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Re: leca - "floaters" vs. "sinkers" ?? [Re: IGnosticAbhorI]
    #4061254 - 04/16/05 02:08 AM (11 years, 7 months ago)

Quote:

IGnosticAbhorI said:
Bigger = Rougher surface...Smaller = easier to spread out...




Affirmative - I like to have mostly small ones on the top surface, keeps things more stable.

But I was wondering about any potential/miniscule difference in humidity raising properties.  Prolly either no difference whatsoever, or no difference worth noting - let alone worrying over.  But I'm still curious from a purely technical standpoint.


Quote:

More porous = Better "wickage" lol




da na na na - "Wick it!" 
daa naa naa - "Wick it good!"

sorry.


Quote:

just put the floated under the "sinkers" :wink:




Heheh - that's exactly what I ended up doing:




Also, in some testing/experimentation I've done w/ my pod - I've noticed that the closer the water level is to the top surface of the leca ( especially when the bubblers are going ), that the humidity goes higher. This seems logical to me, but I swear I can recall someone saying that you want the water to be _lower_ from the top surface for better humidity... can anyone confirm?

Thanks dude!

Beers!


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OfflineVALIS
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Re: leca - "floaters" vs. "sinkers" ?? [Re: PowerTrip]
    #4061277 - 04/16/05 02:23 AM (11 years, 7 months ago)

Quote:

PowerTrip said:The floaters must be floating because they have air trapped inside, which means that they are not letting water in.




That makes sense... I hadn't considered air being trapped. This could explain why many of the ones I submerged never sank, even after nearly a week.

Which at least confirms that having floaters on the bottom is fine - so long as you got sinkers on the top, doing the actual wickamatory wickage wickamuhfication.


I can rest easy now.

(c8=


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OfflineIGnosticAbhorI
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Re: leca - "floaters" vs. "sinkers" ?? [Re: VALIS]
    #4061288 - 04/16/05 02:27 AM (11 years, 7 months ago)

Quote:

This seems logical to me, but I swear I can recall someone saying that you want the water to be _lower_ from the top surface for better humidity... can anyone confirm?




It's true....But once you put in so much, it stops...Basically means that you can only "wink" it so much....

You can probably get it to 100%...Or let's say 90%...But once you put in so much water (typically once the water is at the rocks or over), you'll notice that the humidity begins to drop...

And just some FYI....100%= no real humidity....

100% is necessary for it to rain...Why? Because 100% means that the air can't hold anymore water lol...:shrug:
Just something that i found funny i guess

:thumbup:

-Gnostic


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Invisibledeathbychimney
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Re: leca - "floaters" vs. "sinkers" ?? [Re: IGnosticAbhorI]
    #4061372 - 04/16/05 03:03 AM (11 years, 7 months ago)

i guess mine float too, but at 3" water 4" hydroton it doesn't get a chance. when i washed it out in a big tub and had in excess of 10" of water, it all floated


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OfflineUnderhillmaster
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Re: leca - "floaters" vs. "sinkers" ?? [Re: deathbychimney]
    #4062472 - 04/16/05 03:20 PM (11 years, 7 months ago)

Would this be a valid way to examine the wicking ability? Weigh one of each when it is totally dry and write down weights. Then submerge under water for an equal amount of time. Then weigh again and write down new numbers. Do a little math and figure out the percentage increase in weight due to water. Whichever had the higher percentage increase would have the greater wicking ability? lol, just a guess


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