Medium light dosing - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 05-11-2015, 11:48 PM Thread Starter
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Medium light dosing

I currently have a low light, low tech tank. However, I'm wanting to up the lighting to medium. Mostly because I want to carpet the tank with Staurogyne Repens. I'm planning on hitting the S. Repens with 45-50 PAR and no CO2.

My questions are what do I need to do? Is that even possible without CO2? Do I even need to fertilize without CO2? Should I only dose micro or macro or both? I don't mind waiting a year or two for the plants to grow in at all either, so if time is all I need, then I'm fine with that too.
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post #2 of 6 (permalink) Old 05-12-2015, 12:02 AM
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IMO, and it's just my opinion, with that amount of light CO2 would be a great benefit in terms of growth and plant health. I would be concerned you're going to be asking a bit too much from the plants to thrive without it at that PAR level.
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post #3 of 6 (permalink) Old 05-12-2015, 12:04 AM Thread Starter
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What should the PAR be around if CO2 is out of the question?
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post #4 of 6 (permalink) Old 05-12-2015, 12:08 AM
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Quote:
Originally Posted by samuricex View Post
What should the PAR be around if CO2 is out of the question?
30-35 maybe? Of course this just based on other threads I've read both here and on The Barr Report. I have around 45 PAR ( it has been a long time since I measured it ) at substrate level in my 75g using 1x54 T5HO and dose maybe 1/3 what would be considered standard EI levels for that size tank. I've never tried it without CO2 and algae is pretty much nonexistent for me other than some GSA on the glass every couple of months. I could be wrong though and you could be fine without CO2. It might be worth a shot to see how it goes without it. I'd be interested in the results if you decide to give it a go.

Last edited by Jeff5614; 05-12-2015 at 12:19 AM. Reason: addition
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post #5 of 6 (permalink) Old 05-12-2015, 12:16 AM Thread Starter
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The PAR in my tank is actually around 34-36 right now. Is that okay for S. Repens? And do you think dosing would help at all at that PAR?
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post #6 of 6 (permalink) Old 05-12-2015, 12:48 AM
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I think S repens will be okay at that light level. Here's a link on The Barr Report for nonCO2 methods. Types of lighting has changed since it was first written so keep that in mind but still plenty of good info.

http://www.barrreport.com/forum/barr...on-co2-methods
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