CO2 levels in a 6g nano? - The Planted Tank Forum
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post #1 of 2 (permalink) Old 12-27-2005, 01:05 PM Thread Starter
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Question CO2 levels in a 6g nano?

Well .. since I didn't really get an answer to my question in the Nano forum, and it's more related to water chemistry, I'm going to post it here too. Sorry mods - please delete the one in the nano forum if required.

I've got a 6g nanocube setup with Hygro Difformis, Bacopa Carolinia, and some Dwarf Hygro. I also have a petite anubias nana tied to driftwood via fishing line.

I dose about 3/4 capful (3-5mL) of Seachem Excel Sunday (water change day), Tuesday, and Thursday.

The filter is built into the tank (JBJ Nanocube) and I have it pointed away from the surface of the water.

I guess my question is do I need to point the filter outflow towards the surface for added agitation? Or is the Excel doing its job where I will need to instead keep the outflow pointed downwards?
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post #2 of 2 (permalink) Old 12-27-2005, 03:08 PM
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Well, excel is not carbon dioxide, so it doesn't matter where you point your filter outflow. Excel is a liquid carbon supplement, thus it cannot be outgas'd.

Since I've seen O2 test results both before and after adding Excel, I'd suggest pointing the outflow up for a little surface agitation. Excel dosing causes a slight dip in O2 levels for a short time, so this will help ensure you have plenty of O2 thru normal gas exchange.
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