09-25-2011, 12:24 PM
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Originally Posted by saint fu
thanks for the tips, i'll keep an eye on my levels and do water changes as needed.
as for removing the O2 wand, is there a good sign that it is time to remove it and let the plants convert the CO2? I'm adding plants in slowly, mainly because I want to see what my fish will/won't eat, and because I've never had live plants and don't want to bite off more than I can chew too fast.
I would remove it now. Plants need carbon, it is a macro-nutrient, and occurs as CO2 for most plants. But CO2 is slower for plants to assimilate from water than air, so any device that dissipates it from the aquarium is likely to be detrimental. CO2 occurs from the respiration of fish and plants, but more comes from the breakdown of organics in the substrate by bacteria. The level of CO2 in a moderately-stocked tank is therefore not going to be great. Carbon can easily become the limiting factor in plant growth, and this leads to other issues like algae. So, keeping it in the tank as much as possible is a good maxim.