A drop checker is a simple and reliable device for measuring the level of dissolved CO2 in aquarium water. The drop checker hangs from the wall of the tank inside the tank and completely underwater, e.g. with a suction cup, and contains a liquid with a pH indicator dye in the “drop” portion which is […]
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Science of water parameters: pH/KH/CO2 equilibria, measurement, buffering, interpretation.
“Estimative Index” aquarium plant fertiliser method and strategy The ‘estimative index’ (EI) is a fertilizer concept originated by Tom Barr where the general idea is to never have plant nutrients be limiting in the water column. Plants will grow and generally outcompete algae (so the theory goes). In practice, while I’m sure the outcompeting part […]
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