Fantastic pictures. There is something on a suction cup in the each tank with a thin tube coming out. Is that some type of a low tech co2 diffuser?
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75g acrylic, DIY stand and canopy, Eheim 2026, 2234, Pressurized co2 + SMS122, Suntek 54wT5 x 2 + 96w PC, EcoComplete and Moon sand.
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