My DIY C02 2.5ft for your reference.
Start out with eheim filter and dennerle C02 reactor.
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Later when water become clear use smaller filter from ALLLIFE and change to the UP reactor coz the reactor more efficient dissolving the C02 and furthermore very little C02 is lost.
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The C02 bought the DIY dennerle type but later did the yeast+sugar using the bottle.
After 1 month with the setup.Anyway lights is 2x 18w FL at 10hrs and water change 25% every week with only a puffer fish to eliminate snail, 2x yellow SAE for algae, 1 Yamato shrimp also for algae and 1 female betta for bioload.
Later if already confident can try more advance setup with pressurize CO2+solenoid+timer for CO2, external filter, surface skimmer and more light wattage for difficult plants like rotala macrandra.
My 2ft setup below is abt 2wks.The rotala macrandra is the red plant.
Hope the pics helps.
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