Pearling?? How?? HUH - The Planted Tank Forum
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post #1 of 5 (permalink) Old 08-18-2008, 05:38 AM Thread Starter
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Pearling?? How?? HUH

I have a bunch of plants, that i tossed in my 5g tank that will be a holding tank for yellow shrimp, this tank has NO Co2,Ferts,or even any fish, just snails, but the plants are pearling!!! Any ideas HOW? i was under the impression that At least CO2 or Some form of CO2 like additive like excel was needed to achieve pearling?
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post #2 of 5 (permalink) Old 08-18-2008, 05:50 AM
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Pearling is due to water that becomes saturated with oxygen and any more oxygen produced by the plants is given off in a gaseous form.

So, CO2 and/or Excel are not necessary for pearling.
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post #3 of 5 (permalink) Old 08-18-2008, 05:59 AM
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Yep hes right often when I change the water in the tank it will pearl in about 2 hours without any CO2.
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post #4 of 5 (permalink) Old 08-18-2008, 01:59 PM
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Also low water flow can lead to the oxygen saturation easier that high water flow(surface disruption) as it cant off gas or equalize as easy. I saw pearling on my 10G w/ low flow and a couple of spiral screw in bulbs. Now that I upgraded the filter I get bubbles trapped under leaves which is pearling but nothing compared to what others actually mean when they say pearling
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post #5 of 5 (permalink) Old 08-18-2008, 03:11 PM
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Oxygen's saturation point at the temps we keep our tanks at is only about 8 ppm or so. Once that is achieved you will start to see pearling. Often times you will see this phenomenon right after doing a large water change.

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