too much light in my 1.5g hex - The Planted Tank Forum
 
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post #1 of 11 (permalink) Old 11-08-2007, 05:59 PM Thread Starter
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too much light in my 1.5g hex

so i've got a screw in 10 watt flourescent bulb from walmart's fish dept. in a fixture with the inside painted white above my 1.5g hex and i think it's too much. algae is pretty out of control. is there anything out there with less wattage?

the only plants in there are anacharis and moneywort which don't need much light. and there's a little black molly (just put him in to try and help with the algae), a beta, couple RCS, and a good sized ramshorn snail.

the snail leaves behind some pretty cool zigzag patterns from where he cleans algae off the glass but it's way too much for him... i was thinkin about putting in an otto but it's almost overstocked already...

the tank has 2 hagen DIY co2 kits bubbling into it also.

so yeah, should i decrease the wattage and how can i? the photoperiod is at 8 hours.

or how else could i go about fixin my algae issues?
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post #2 of 11 (permalink) Old 11-08-2007, 07:34 PM
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Reduce the photoperiod to about 5 hours and see if that helps. If not, then chances are you have too many nutrients in the water. Maybe you're feeding too much, or too often?
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post #3 of 11 (permalink) Old 11-08-2007, 07:37 PM Thread Starter
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Reduce the photoperiod to about 5 hours and see if that helps. If not, then chances are you have too many nutrients in the water. Maybe you're feeding too much, or too often?
i'll drop it down to 5 hours and see if that helps. and i feed a tiny little pinch once a day.
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post #4 of 11 (permalink) Old 11-08-2007, 09:54 PM
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Wattage

Also, there are 7w cf twisties out there, if you have only low-light plants that might be a good idea.
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post #5 of 11 (permalink) Old 11-09-2007, 01:47 AM
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You can also try to add some fast-growing plants or floating plants.
Floating plants might be useful to provide shade. Your low light plants don't need all the light anyway.
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post #6 of 11 (permalink) Old 11-09-2007, 04:44 AM
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I'd take the Tom Barr approach, and say that it's probably not too much nutrients, but too much of the wrong kind, and not enough of the right other stuff. If you have lots of light, and not much carbon, algae will bloom with almost any small amounts of NO3 or NH4. I'd suggest that you do a water change or two, and start adding about 1/4 mL excel every day. Also, add some fast growers as dekstr suggested. I think you'll find that reducing photoperiod won't do much. Let us know how things go.

-Jared
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post #7 of 11 (permalink) Old 11-09-2007, 04:29 PM Thread Starter
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Originally Posted by yotsuya View Post
Also, there are 7w cf twisties out there, if you have only low-light plants that might be a good idea.
i searched online and found a couple 7w cf's but they're all in the 2500 - 3000 K range... anything out there higher?
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post #8 of 11 (permalink) Old 11-09-2007, 04:30 PM Thread Starter
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Originally Posted by dekstr View Post
You can also try to add some fast-growing plants or floating plants.
Floating plants might be useful to provide shade. Your low light plants don't need all the light anyway.
the plants in there are fast growing. and floating plants isn't really an option since the surface area is VERY small on a 1.5g hex. they'd completely cover the whole water surface in no time and i wouldn't be able to get much food to my fish...
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post #9 of 11 (permalink) Old 11-09-2007, 04:32 PM Thread Starter
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Originally Posted by j_m_lizard View Post
I'd take the Tom Barr approach, and say that it's probably not too much nutrients, but too much of the wrong kind, and not enough of the right other stuff. If you have lots of light, and not much carbon, algae will bloom with almost any small amounts of NO3 or NH4. I'd suggest that you do a water change or two, and start adding about 1/4 mL excel every day. Also, add some fast growers as dekstr suggested. I think you'll find that reducing photoperiod won't do much. Let us know how things go.

-Jared
admittedly i hadn't been very religious about doing WC's and keeping the DIY co2 completely up to par.

i'll see if the shorter photoperiod and consistant WC's helps anything.
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post #10 of 11 (permalink) Old 11-14-2007, 04:55 PM
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1000bulbs.com has crazy selection of screw ins.
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post #11 of 11 (permalink) Old 11-19-2007, 04:28 PM Thread Starter
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wow... they do. totally bookmarked that site!
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