Help with Algae while growing HC emerssed - The Planted Tank Forum
 
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post #1 of 8 (permalink) Old 01-04-2008, 12:04 PM Thread Starter
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Help with Algae while growing HC emerssed

I have been growing my HC emerssed for almost 3 weeks now. The water level is just below the surface of the gravel and growth has been slow but steady.

Recently i noticed green algae forming on the surface of some of the gravel and plants. What can I do to eliminate it?

Thanks,
Brett

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post #2 of 8 (permalink) Old 01-04-2008, 03:13 PM
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don't worry about it.. Algae is harmless as long as it doesn't cover the leaves.


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post #3 of 8 (permalink) Old 01-04-2008, 03:19 PM Thread Starter
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Thanks. But it is covering some of the lower leaves. I read somewhere that you can spray Excel on the algae. Is this true?

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post #4 of 8 (permalink) Old 01-04-2008, 03:55 PM
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Sound like you just have too much water in your growing tray/tank. When growing HC emersed you only need to keep the soil/substrate moist, not wet.

I grow HC in a seedling tray outside and have slits cut into the sides of the tray about 3/4" from the top to drain excess water. It grows substantial root structure that will reach 1-2" deep into the substrate.

óBill

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post #5 of 8 (permalink) Old 01-04-2008, 04:50 PM
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I wouldn't recommend spot treating the algae with excel in an emersed tank. Excel will burn the HC, too. HC likes excel, but not straight. You could try fairly diluted excel, but I'm not sure it will have much of an effect. I have a little algae in my emersed tank, but it's not doing much harm. Unfortunately, one little duckweed leaf found it's way in...now I'm in trouble.

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post #6 of 8 (permalink) Old 01-04-2008, 08:20 PM
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I would try lowering your water, I had mine too high at one point and got poor growth. I lowered it another 1/2 inch. Now the HC is taking off like mad. I mist the SMS / HC 3-5 times a week with a solution of excel and highly diluted miracle grow. I think I used 1/2tbsp for a large garden size spray bottle, and 30ml of excel. My emeresed setup is a 90g with 2x150mh and 2x55 ah supplys for 9hrs/day. I have massive root balls 2"-3" deep.

Another thing I did, BEFORE lowering my water (I had nasty green/brown sludge in places..) I filled the tank 1/2 way.. tossed in a power head and dumped about 150ml of h202 into the tank.. and all the nasty stuff bubbled away.. let it soak for 4 hours, vaced it all out.. filled and drained 1/2 way 3 times. I didnt notice any effect on the HC.

Epic, I too found a leaf of duckweed in my emeresed tank.. However since I lowered the water farther.. the four leaves.. have turned WHITE.. I then removed them and havent seen another one. On another note my 20l that had a duckweed problem.. it started to die off for some reason Lets just hope my other plants dont lol.

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post #7 of 8 (permalink) Old 01-05-2008, 01:29 AM
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emersed growth only need a film thin deep of water.


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post #8 of 8 (permalink) Old 01-05-2008, 01:49 AM
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Here's my HC growing emersed outdoors in a couple of seedling trays filled with AquaSoil Amazonia. They are watered three times a day by a pair of drip sprinkler spray heads.




Here's a closer look at the growing tray.



And some closeups of the growth pattern of the HC.




The AquaSoil is kept moist, but never fully saturated except for immediately after watering. I have holes cut near the top of the sides to eliminate any standing water in the trays.

The growth started out looking pretty typical, but as the summer passed it got denser and denser to the point now where it's a solid mat. A casual glance would lead you to believe that it's a patch of moss.

With the start of winter I've brought indoors or given away most of the bottom tray. But the top tray is still outside and green. It's been a relatively mild winter so far with temps only dropping into the high 30s a couple nights.

óBill

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