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Will I choke my fish if I use a DIY CO2 system? It will be two 2-liter bottles with the yeast/sugar combo for my 55 gallon tank. I will be upgrading my lighting very soon (either tomorrow or within the week) to 100 watts, right now it has stock lighting. I always read to turn off a CO2 system at night but how would I do that? Cinch the airtube at night so the co2 can’t escape?

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Small and concise description of solar photovoltaic systems. How do they work? Do I need batteries?

Yield…