Plant Algae in 20 gallon - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 6 Old 02-04-2009, 12:53 AM Thread Starter
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Angry Plant Algae in 20 gallon

pretty much new to the planted tank thing, and im having some problems. i just recently added some new plants to my tank, and now im getting really bad algae, but its this weird like green film on the glass and brown growth on my leaves, not like hairy plant type algae. does anyone know whats going?

I currently have:
1 Madagascar Lace
2 Bunches of Anachris
2 potted Lutea
2 Amazon Sword

Lighting is 30 watts about 9 or 10 hours a day: one bulb 6700k and one 10000k bulb. i am currently dosing flourish excel every other day and dont use any ferts.
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post #2 of 6 Old 02-04-2009, 08:31 AM
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The green stuff sounds like blue-green algae, also called cyanobacteria. It's generally caused by low nitrates. It should come out manually pretty easily, you can also put the excel directly on it, that helps too. Nitrates can be increased by dosing or feeding a little more heavily. Try dosing excel every day and make sure you have good circulation throughout the tank. The brown stuff sounds like diatoms, generally appear in newer setups, that should go away with time, maybe get a couple otocinclus cats, they love that stuff. Are the lights t5 HO? If so, maybe back the lighting period down to 7 or 8 hrs, probably a good idea regardless. HTH!!
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post #3 of 6 Old 02-05-2009, 04:51 PM Thread Starter
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no the lighting is two 15 watt t8 bulbs. and after a bit of research i found that i have green spot algae. nothing i read was exactly clear on how to get rid of it. the only thing i picked up was that i should be dosing ferts into the tank. is this true, and if so what kind? im a n00b to planted tanks
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post #4 of 6 Old 02-08-2009, 02:57 PM Thread Starter
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is Seachem Flourish a good fert? it seems to have everything in it
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post #5 of 6 Old 02-16-2009, 05:15 PM
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try adding a eurasion water milfoil(Myriophyllum spicatum) and maybe some hydrilla.
The allelochemicals produced by these plants produce something called a hydrolysable tannin which
inhibits the growth of cyanobacteria and green algae.

Hope that helps,

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post #6 of 6 Old 02-16-2009, 09:36 PM
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Seachem Flourish works for me. Realize that your tank will always have some sort of algae. The key is how much and how often you have to clean it. If you're cleaning algae every week then that's too often.
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