Hmm.... I'm not sure bout the excel, I don't have any experience with it. However, you can set it up with diy co2. I know because thats what I use in my guppy tank with riccia. If you're looking for riccia, I have some for sale in the swap and shop.
"What we do in life, echoes in eternity." - Gladiator
If I could harness the power of the sun, I'd focus it on my plants and watch them grow.
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