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Aquarium Spare Parts
Sera Test Kit - GH - General Hardness (F) (04110)
Makes it easy to monitor the total hardness
For approx. 420odGH.
In case of too low GH values we recommend sera mineral salt. High total hardness levels can be lowered by mixing in R/O water.
For creating soft water we recommend adding sera blackwater aquatan or filtering through sera super peat.
