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Old 03-04-2004, 05:47 PM   #1
trenac
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I have a heavily planted 20G long tank...I am having problems with hair algae on the plants, mostly on the Foxtail & Hornwort, and some on the glass. I know it takes a balance between ferts, light, and C02 to keep algae in check. I need everyones help in finding out what may inbalance is.

Water: PH 6.9, KH 3, C02 14ppm, nitrate/nitrite 0, phos 0.1-1.5, iron 0.1

C02: Natural plant system by Nutrafin

Temp: 76 degrees, weekly water changes of 3G

Light: JBJ PC light w/6500k bulb on for 10 hours daily

Filter: Fluval 204, I use phos-guard & algone to help with the algae

Fish: 3 spiketail guaramies, 2 endlers, 2 rams, 2 corys, 1 algae eater, 4
amano shrimp...Feed small amounts 1-3 times daily.

Ferts: Kent grow 4 drops dailey, Seachem trace 1 1/2cc daily, Seachem
tabs for the substarte every three months

I have read that you need to keep C02 between 20-30ppm, is this correct. If so mine is low at 14ppm. My algae problem is not out of hand as of yet but I am afraid it will be if I don't get that balance I need. Any suggestions welcomed.
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Old 03-04-2004, 06:09 PM   #2
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trenac,

The first red flag is your Nitrates at 0ppm. They should be 5-10ppm... Yes your C02 could be higher..... How many watts per gallon do you have????
Second red flag is your phosphates are a little high. Hair algea love yummy phosphates.... I would increase your water changes to get your phosphates below .5ppm and get some KNO3 to boost your nitrates.



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Old 03-04-2004, 06:56 PM   #3
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This is what confuses me I thought nitrates will cause algae if to much above 0. This way I have been using the algone in my filter but I guess I need to remove it. Can someone explan this Nitrate thing to me in not to technical terms. I have a little over 3 WPG of light. Do you think increasing water changes too 5G a week will be enough to bring the phos down?
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Old 03-04-2004, 07:13 PM   #4
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trenac,

The best way to reduce algae is to get lots of fast growing plants. Nitrates, along with phosphates and potassium (and CO2) are considered "macro nutrients", meaning that plants use them in comparatively large quantities to build up substance (=grow :mrgreen.
If Nitrate is zero, your plants will not be growing optimally. Algae are much better in using unproportional amounts of nutrients, and take over then.
The ratio of macro nutrients nitrate:phosphate:potassium in a high intensity tank like yours should be around 10:1:10 (ppm), which will be optimal for plant growth, therefore supressing algae.
You might want to consider using Flourish instead of Flourish Trace, it is more potent...
Be careful when adding more CO2, with a kH that low there is a risk of pH crashing. Need to monitor pH and kH!

Hope that wasn't too technical
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Old 03-04-2004, 07:30 PM   #5
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Do you know what your exact phosphates are?

There's a big difference between .1 and 1.5

I wouldn't worry too much about your KH at 3. At a KH of 2 then I would be careful because you will start having problems controlling it. Just make sure that you do weekly water changes and you should be fine with your KH and C02.

I agree with Wass.. Get some fast growing plants if it's really that big of a problem. Salvinia and watersprite are among my favorites for nutrient killing.

good luck.
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Old 03-04-2004, 10:21 PM   #6
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Quote:
Originally Posted by Fat Guy
There's a big difference between .1 and 1.5
Sorry, I meant to say it was between 0.1 and 0.15 . ops:
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Old 03-04-2004, 10:24 PM   #7
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Quote:
Originally Posted by trenac
Quote:
Originally Posted by Fat Guy
There's a big difference between .1 and 1.5
Sorry, I meant to say it was between 0.1 and 0.15 . ops:
Ok, so your phosphates are in a good range. Nitrates are still an issue... Yes more or bigger water changes will make for happy plants and fish..

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Old 03-13-2004, 01:52 PM   #8
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In the last few days my algae problem has exploded, it is thick on my foxtail & spreading to my other plants & rocks, it also has become thicker on the glass. So I have stopped all ferts intill I can get my Nitrate up. Was stopping ferts something I should have done?

I have been dosing with Seachem Nitrogen at 1/2cc a day to get my nitrates up but they are still at 0. Should I increase it to 1cc per day or more?

Also since my foxtail are so badly covered with algae should I do a drastic prune or just pull them out? Or any other suggestions?
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