do I need co2?
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Old 03-21-2013, 07:47 PM   #1
korzal
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do I need co2?


Hello all,

I plan on setting up my 2 gallon fluval spec as a planted tank with aquasoil and CRS.
I recently came across a great deal at my LFS on a Tom Perchlight 13w for $9

However, I'm starting to wonder if this high light means co2 injection will become necessary to prevent algae? This will be my first planted tank so co2 is still a little daunting to me. Was hoping to get by with just excel dosing. Not sure on specific plants yet, but I'd like to plant it fairly heavily with a nice lush carpet.

So what do you think? Would excel, possibly some floaters, less hours with the light on, etc. do the trick? Or will co2 make my life that much easier?

Thanks in advance!
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Old 03-21-2013, 07:52 PM   #2
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You may want to wait till another member chimes in but I believe if you're doing crystal shrimp you're going to want to avoid CO2 and excel.

Could always do a DIY setup and add in floaters to help


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Old 03-21-2013, 08:07 PM   #3
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2 gallons is too small for a CRS tank.
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Old 03-21-2013, 08:19 PM   #4
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I'd start out with RCS for new owners, much much easier. Floaters will reduce the intensity a lot. DHG is a nice low light no c02 foreground carpet.
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Old 03-21-2013, 08:41 PM   #5
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thanks for the replies. I wanted to skip some steps in the shrimp department but maybe starting with RCS would be best... either way, fauna won't come until I'm happy with my water parameters and flora.
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Old 03-22-2013, 08:11 PM   #6
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so can anyone confirm if 13W is too much light for a 2gallon tank without co2?
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Old 03-22-2013, 08:58 PM   #7
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Good news: I've used 13w CFs on 2 gal and 2.5 gal tanks with no CO2, excel only set ups. Worked great with 8-10hr photoperiods

Bad news: These tanks were shrimp death traps...shrimp would die as they got to 'adult' size. I blame excel...and maybe low GH contributed too?

Not sure if you could go no tech, but don't see why not. shorten the photoperiod perhaps.
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Old 03-23-2013, 05:24 PM   #8
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Quote:
Originally Posted by korzal View Post
so can anyone confirm if 13W is too much light for a 2gallon tank without co2?
I think thats about right. My 1.5g bowl has an 11w light, no co2/excel. Plants are doing great and very minimal algae.

I did have and algae outbreak about 3weeks in, I think because i didnt plant heavily enough to start, once the floaters and stems started filling in the algae all but dissappeared.
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