Guides
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CO2 Drop Checkers Compared - Reading Your Tank's Real CO2 LevelHow standard, long-neck, inline, digital and DIY drop checkers measure dissolved CO2, with response lag, accuracy and cost compared so you can pick the right one for your tank.
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CO2 Solenoid Valves Compared - Automating Your PhotoperiodHow inline, regulator-integrated, AC mains, low-voltage DC and smart WiFi CO2 solenoids switch gas flow on and off, with control input, fail-safe behavior and cost compared.
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Planted Tank Lighting Compared - Matching PAR to Your PlantsHow fluorescent tube, standard LED, high-output LED, app-controlled LED and DIY clip-on fixtures differ in PAR output, spectrum control and running cost for planted aquariums.
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Aquarium CO2 Diffuser Comparison - Which Type Is Right for Your TankA side-by-side comparison of glass, ceramic, inline, reactor and DIY CO2 diffusers, with properties, pros, cons and buying advice.
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CO2 Regulators Compared - Single-Stage, Dual-Stage and BeyondHow single-stage, dual-stage, mini, solenoid-equipped and precision CO2 regulators hold pressure as a cylinder empties, with stability, cost and setup fit compared for planted tanks.