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post #1 of 9 (permalink) Old 01-12-2005, 12:39 AM Thread Starter
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Unhappy plants stop growing algae didnt

A few months ago I removed the stone top layer of substrate from my 20H and replaced it with a sand. The under layer is almost completly laterite. Once the tank was replanted and the sand had settled. There was an algal bloom(as expected), however plant growth was very timited. Even specied such as hygro. polysperma remained stagnant. Green hair algae is a constant problem even two months out. Plants are growing ut not enough to keep algae at bay. There is about 100w 6700K of light on the 20H tank. Does anyone else know of any reasons for the anemic plant growth?
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post #2 of 9 (permalink) Old 01-12-2005, 12:48 AM
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What are your nutrient levels and water parameters. Are you adding any ferts.? Are you injecting CO2?
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post #3 of 9 (permalink) Old 01-12-2005, 12:52 AM Thread Starter
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no Co2, I am going to purchase a Nitrate test.
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post #4 of 9 (permalink) Old 01-12-2005, 12:59 AM
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Quote:
Originally Posted by waterdog1
no Co2, I am going to purchase a Nitrate test.
That much light without CO2 only feeds algae, no surprise. You need to reduce the light to no more than 50w without CO2. How are you fertilizing? starving the plants also encourages algae to grow.

Truvu 100g Flourite, wet/dry, AHSupply 302w PC, PinPoint controller
10gallon15w T6+15w T8
55gallon40w T6 ODNO4x, no CO2. Discus grow out.
10gallon Tonina tank, 2x15w T6 ODNO 4x
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I will do aquascapes after I collect all the plant species and grow them to perfection.
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post #5 of 9 (permalink) Old 01-12-2005, 01:01 AM
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Quote:
no Co2
Get the nitrate test kit anyway, you need it, but I think no CO2 is the source of your problems. Even though it is a high tank, 100 watts is still a lot of light over 20 gallons. How are you getting your 100 watts (PC, ODNO, NO ...)?
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post #6 of 9 (permalink) Old 01-12-2005, 01:13 AM Thread Starter
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65w pc and 40 w NO. I never had problems before with this light
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post #7 of 9 (permalink) Old 01-12-2005, 11:30 PM Thread Starter
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do you think adding plant fertalizer to the water, or do you think it would make algae worse. I do have a chance to buy a 2.5lb Co2 canister+regulator for 62 dollars, maybe i will try it...
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post #8 of 9 (permalink) Old 01-13-2005, 12:37 AM
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From my experience, adding ferts will make it worse. Your plants are not able to grow because you lack co2. With that much light, your plants need the extra co2 that your fish cant provide. Your plants wont take up the extra ferts, but algae will.
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post #9 of 9 (permalink) Old 01-13-2005, 03:30 AM Thread Starter
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well, I backed the light down to 85w over my 20H. I am going to try a DIY yeast co2 generator to se what happenns. If I like the results I will invest in a CO2 tank. Any other thoughts appreciated.
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